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Weekend Science Fun: Projects with Tin CansYou won’t believe how many science projects you “can” do with a couple of tin cans.  Before we start the physics, however, let’s do a bit of chemistry. Is what we call a “tin can” really made of tin ? How would you check? It seems that the can our beans come in should be called a steel can because it is made mostly of steel, although it may have a light coating of tin to prevent rusting. Technically, if a can were made only of tin a magnet should not stick to it. Magnets are attracted to cans that contain iron, usually in the form of steel. Is a magnet attracted to your can of beans? What about an aluminum soda can? Pick up a magnet and find out. What got us started with tin cans this week was an article in a book that promised you could get a tin can to roll uphill. When it did not work as the book suggested it should, we decided to investigate further. Activity 1. Uphill Rolling Can
* Remove the lid of the can with adult supervision, and make sure there are no sharp edges. Roll the can across the floor or on a table to see how it behaves. Build a ramp with a slight incline with the books. Try to roll the empty can up the ramp. What happens? Now roll out a lump of the clay into a worm or snake shape. Attach the clay to one side of the can on the inside (see photograph). Roll the can across the floor or table. Does it behave differently than it did without the clay?  Try the ramp. Start the can with the clay up versus the clay down, until you can get the can to roll uphill. If it doesn’t work for you, adjust the steepness of the ramp. You can also put rubber bands around the outside of the can to increase grip. Make sure they are even so they don’t over balance the can. Activity 2. Tin Can Car You can take the idea of a self-propelled tin can a step further by creating a rubber band-driven version. The idea is to put two holes in each end of the can (or can lids) that line up with each other, slip a rubber band (or similar elastic material) through the top holes and then add a weight in the center, in the middle of the can. Slip rubber bands through the bottom holes. Tie the ends. Roll the can and it should roll back on its own from the weight in the center. PBS Kids has a good description of how to make a can car . Description of a similar device from the November 1910 issue of Popular Mechanics . Be aware that ideas of safety were different back then. For example if you try this one, you should use a zinc sinker (available at fishing supply stores) rather than lead. Activity 3. Tin Can Telephone A classic activity is to make a telephone using two tin cans and a piece of string.
*Unlike in the video below, children should perhaps wear eye protection while creating the hole in the bottom of the can. Hammer the nail into the center of the bottom of each can to create a hole. Remove the nail. Feed the string through the holes and tie a knot so that the knot prevents the string from coming out through the bottom. Both cans should now be connected by the string. Hold the two cans far enough apart so the string is tight. Take turns talking into the can and then listening to the other person talk. You can even decorate your can like they did in this short video. Activity 4. Musical instruments
Cut the stem off of a balloon and roll it over the top of a can. This is not as easy as it sounds, but if you can get a tight fit you will have a wonderful drum. Use hands or chopsticks to drum on the balloon top. Compare sounds of different-sized cans.  2. Tin can guitar Activity 5. Sand Resistance (Advanced)
Fill a large bin with play sand. Press one can into the sand with the open end down. Press the other into the sand closed end down. Which has the most resistance? Sounds simple, but there are some complex physics involved. To see the expected results, watch this video For an explanation of the open can versus closed can in bucket of sand, see Science Now (website does contain ads). A Few Other ideas: Information about a stirling tin can engine in the Doable Renewables book review When you are done with your can, remember: “…one plant in a tin-can may be a more helpful and inspiring garden to some than a whole acre of lawn and flowers to another.†~ Liberty Hyde Bailey Hope you have fun with your tin cans. Let us know how the activities turn out and if you have any other ideas for science with tin cans. Fun Science Activity , Physics Science projects for kids with tin cans tin can science  June 28, 2011 at 1:01 pm Wow! These are all fun science projects and all easy to do too! I’m going to recommend this site to my friends and their children.  April 4, 2014 at 3:44 pm I love the tin can car!!! I got it rolling up a slope which looked so cool. It may be used for a science exhibition Leave a ReplyYour email address will not be published. Required fields are marked * Notify me of follow-up comments by email. Notify me of new posts by email. This site uses Akismet to reduce spam. Learn how your comment data is processed . Subscribe to Blog via EmailEnter your email address to subscribe to this blog and receive notifications of new posts by email. Email Address  For more information, see Roberta Gibson Writes . Recent Posts
© 2024 Growing With Science Blog Theme by Anders Noren — Up ↑  ScienceDemo.org Collapsing CanThe collapsing can demo is one I loved seeing for the first time when I was at school, although my teacher used a tin with a screwed down lid which took a little more time to cool down. In some ways I prefer the version using a can with a screw lid because the additional waiting time makes for an even more dramatic “collapse”. Doing the demo with a drink can is of course far cheaper (and I think, more reliable as it doesn’t depend on the lid being screwed down properly) and I suspect this is why the approach we use in our video has become far more widespread in schools. I like the demo a lot but, as I hope we’ve managed to convey in the video, I think we need to be careful how and why we use it in our lessons. This is a really fantastic demo for using the Predict, Observe, Explain (POE) approach as the explanation of what’s going on is not entirely straightforward – there are a couple of things relating to the behaviour of particles and the action of forces that need to be considered and this can lead to some really interesting discussion with students, providing they’re familiar with the relevant concepts. We’ve suggested in our video that the collapsing can demo can be used in conjunction with another demo, as a way of “ scaffolding ” (I really hope I’ve used that term correctly – I think this may be the first time I’ve used it in writing in this context). Once you’ve done the demo live in class, you’ve got the perfect justification for showing your students this video of a rather more spectacular demonstration of the same physics at work:  6 thoughts on “Collapsing Can”I always like the collapsing can demo – it challenges even the most able kids to use the particle models they already know to come up with an explanation. I’ll try it with the vacuum fountain in future too – that’s a handy extra tool to help with the particle theory models. Beautifully presented and shot. Thank you. FYI pressure using a rotary pump like that in that small volume after 15 seconds is likely to be ‘a few’ millibar – i.e. less than 1% of atmospheric pressure. For a few years now I’ve been using the collapsing can as one of five ‘amazing pressure demos’ that A2 students have to explain in terms of kinetic theory. They like it (it goes bang), they can show their friends (beer cans and a camping stove at a festival), and if they’re really good they can explain it too in terms of the kinetic theory! Good point about it being a long chain of argument, I’ll definitely include the water fountain next year as its a more obvious demo. BTW, the other demos I use are (1) the inverted tumbler of water with a piece of card over the top (very difficult to explain using kinetic theory, I do it as an example) (2) the poor man’s magdeburg hemispheres (one student pushes together a pair of rubber sink plungers, then attempts to pull them apart) (3) a small sealed balloon inside a bell jar connected to a vacuum pump and (4) the ‘boiled egg into the bottle’ trick, done with a conical flask and nothing more than a trough of ice water and a trough of very hot water. My favourite for sheer theatricality (and ease of explanation) is the egg into the bottle. There’s no sudden bang, but a long hard squeeze instead. Do you plan to make more of these? I often feel that non specialists struggle out of their subject area and would benefit from this sort of resource. Written instructions are great but a video helps so much more. What would be good to see is video accompanying the practical physics website so that each experiment had an accompanying video – a massive project! Pupils do experience the effect outside of the classroom, every time they use a straw they create a region of low pressure and form their own internal water fountain but very few will think of it being to do with difference in pressure, just a suck.
Hi Alom, Great video and nicely explained demonstration. I really like the addition of the YuoTube video at the bottom with the imploding tank. I think it really shows how the same principle works on a much bigger scale. Kids can crush a can with their hand, but crushing a whole tank of those dimensions is another story 🙂 Very nice, thanks! Alessio. Leave a Reply Cancel replyYour email address will not be published. Required fields are marked * Theatre, props and explanations, oh my!Skip to Content Other ways to search:
G430: Pressure and Temperature – The Collapsing CanIntroduction A small amount of water is added to an aluminum soda can and brought to boiling on a hot plate or with a Bunsen burner. The water gas molecules will occupy all the space inside the can since the air molecules have been pushed out. The hot gas molecules are the same pressure as the air outside the can. When the can is placed in cold water upside down, the hot gas water molecules are cooled very rapidly. Some of the gas molecules are condensed back into liquid water so there are less molecules of water in the gas phase inside the can. The cold water will also cool any remaining gas molecules, decreasing their kinetic energy and therefore decreases the number of collisions with the walls of the can. This decreases the pressure inside the can. Since the air pressure outside the can is stronger than that inside the can, it causes the can to collapse. H2O(g) à H2O(l)  To Conduct Demonstration
If using a large can do not continue heating the can after inserting the rubber stopper as pressure will increase.
 Chemistry: Charles's Law: The Incredible Imploding Can
Let's do another demonstration. You'll need a brand new, never used, metal can with a screw-on cap. Remove the cap, place the can on the stove, and turn it to "high." After the can has been heated for about two minutes, take it off the stove with metal salad tongs and tightly screw on the cap. Because I know that none of you actually did the demonstration (shame on you!), I'll just tell you what you would have seen—over a period of two or three minutes, the can would shrink until the sides caved in. Way back in 1787, the French scientist Jacques Charles did exactly the same experiment while sitting around the house on a rainy day. (Editor's note: Historians believe that only the year in the preceding statement is correct.) When he observed the can imploding, he devised the following law to explain his findings:
V 1 is the initial volume of the can, T 1 is the initial temperature of the air in Kelvin, V 2 is the final volume of the can, and T 2 is the final temperature of the air (in Kelvin). We will assume that the pressure and number of moles of the air are constant. If the can has an initial volume of 5.00 liters, the temperature of the air before you took the can off of the stove was 250º C (523 K), and the temperature of the air after the can cooled was 25º C (298 K), we can use this equation to find the final volume of the can: Bad ReactionsWhen working with gases, remember to always convert temperatures from degrees Celsius to Kelvin (K = ºC + 273). If you don't, your answer will be wrong!
What this equation means is that when the air inside the can cooled, the volume decreased, causing the can to implode. The kinetic molecular theory would explain this by saying that the air molecules had less kinetic energy at the lowered temperature, causing them to strike the sides of the can with less energy than they did before. Because the energy of the molecules hitting the sides of the can decreased, the pressure inside the can also decreased. When the pressure inside the can decreased, the much higher air pressure outside the can pushed in the sides of the can, causing it to implode.  Figure 16.1 The air molecules in the can hit the inside walls with less energy at low temperature, causing the can to implode as the air temperature decreases. Excerpted from The Complete Idiot's Guide to Chemistry © 2003 by Ian Guch. All rights reserved including the right of reproduction in whole or in part in any form. Used by arrangement with Alpha Books , a member of Penguin Group (USA) Inc. To order this book direct from the publisher, visit the Penguin USA website or call 1-800-253-6476. You can also purchase this book at Amazon.com and Barnes & Noble .
Here are the facts and trivia that people are buzzing about.  You are leaving IngeniumCanada.orgThis link leads to an external website that Ingenium does not control. Please read the third-party’s privacy policies before entering personal information or conducting a transaction on their site. Have questions? Review our Privacy Statement Vous quittez IngeniumCanada.orgCe lien mène à un site Web externe qu'Ingenium ne contrôle pas. Veuillez lire les politiques de confidentialité des tiers avant de partager des renseignements personnels ou d'effectuer une transaction sur leur site. Questions? Consultez notre Énoncé de confidentialité Main NavigationImploding can, hours and location.  You might not be able to feel it, but air actually has a lot of weight pushing down on us. See what happens when you create a soda can that can’t fight back against this pressure — and be sure to bring your earplugs! What you need
Safety first!When experimenting with fire, always make sure that there is adult supervision and help. You must have extinguishing materials (a fire extinguisher or blanket) nearby, in case there is an accident.
Pick up the can, and quickly flip it upside down into the bowl of water. You will hear a loud noise and the can will be crushed into itself! When you heated up the water inside the can, it evaporated. The water vapour created pushed out the air that used to be in the can, and some of the vapour escaped as well. The remaining gas then became all that was taking up space in the can. When you plunged the can into the cold water, the water vapour rapidly condensed (changed from a gas to a liquid). The amount of gas left only was enough to become a very small amount of water. Because you have blocked the hole at the top by plunging it into water, no air can enter to fill up that empty space. This leaves the pressure in the can to be lower than the pressure of the air and water around it. The force of this pressure is what pushes the can inward, crumpling it. When people go deep-sea diving, they have to go in a pressurized chamber that mimics the pressure on land. The weight of all that water makes the deep sea an extremely high pressure environment, and without protection, the gases in their bodies would compress so much that they would be crushed. They wouldn’t completely implode though, as most of the human body is made of water which cannot be compressed. You will have probably noticed that the can is filled with water soon after you submerged it. Can you figure out why? Think about the fact that the air exerts pressure on the bowl of water.  Program Details
Physics Fair Experiments45. imploding tins (cans). A tin (can, beer or lemonade) is containing only a few drops of water. Over a gas burner the water is brought to boiling-point. Then the can is dipped upside-down in a tank with water. Observe how the can gets crushed. Explanation 1: When the water in the tin is boiling, the space in the tin is filled with hot water-vapour. The dipping in the water cools the vapour down. The pressure of the vapour in the tin decreases and the atmospheric pressure crushes the tin. Explanation 2: By boiling the water, the air in the tin is replaced by hot water-vapour. When the vapour is cooled down, the pressure drops to a very low value (considerably lower than would be the case when using hot air, as saturation pressures of water-vapour at temperatures well below 100� C are rather low). The tin is cooled upside-down in the water. One might expect that the only thing that would happen is that water gets sucked into the tin. Indeed some water is sucked in, but the fall of the pressure is so fast, that the water is too slow to enter the tin in full extend. So the pressure stays low for a short while, giving the atmospheric pressure on the outside time to crush the tin. When the tins would be made of sufficiently thick material, the only thing that would happen is that the tins would almost completely be filled with water, as the crushing could not take place. Come-Back CanActivity length, energy engineering forces and motion, activity type, discrepant event (investigatable), make & take. In this activity, students make a Tin Can Toy with a secret mechanism, while exploring kinetic energy . When you roll a Tin Can Toy away, it comes rolling back! Adapted from GEM this Tin Can Toy made of a coffee can contains a simple elastic powered motor. The "secret" to the Come-Back Can is in the weight that hangs from the rubber band. The weight in the Tin Can Toy hangs down as the tin rolls in one direction (and doesn't flip). The kinetic energy of the rolling can will be stored as potential energy in the tightly twisted rubber band -some will not be stored as the rubber band is wound, but transferred to friction (heat) and sound. Once the band has reached its storage limit, the stored energy is released and the Come-Back Can moves backwards towards its starting point. Build a model that stores potential energy and releases kinetic energy. Explain that energy is not created or destroyed, but rather converted from one form to another. Per Tin Can Toy: coffee tin (or plastic container) drill or punch device 2 elastic bands paperclip tape cotton thread or string small weight (e.g. washer) Key Questions
 Vocabulary:
About the sticker Artist: Jeff Kulak Jeff is a senior graphic designer at Science World. His illustration work has been published in the Walrus, The National Post, Reader’s Digest and Chickadee Magazine. He loves to make music, ride bikes, and spend time in the forest. Comet Crisp T-Rex and Baby Artist: Michelle Yong Michelle is a designer with a focus on creating joyful digital experiences! She enjoys exploring the potential forms that an idea can express itself in and helping then take shape. Buddy the T-Rex Science Buddies Artist: Ty Dale From Canada, Ty was born in Vancouver, British Columbia in 1993. From his chaotic workspace he draws in several different illustrative styles with thick outlines, bold colours and quirky-child like drawings. Ty distils the world around him into its basic geometry, prompting us to look at the mundane in a different way. Western Dinosaur Time-Travel T-Rex Related ResourcesElastic powered car, in this activity, students will make a car powered by an elastic engine, and thus kinetic energy. rather than converting…, in this activity, students will play with cars to discover how potential and kinetic energy make them move. toy cars…, elastic energy, ever wonder why a rubber ball bounces, or what makes a wind-up toy go it’s all about the storage of…, balloon-powered car, in this activity , students will make a car powered by the elastic energy of a balloon. this car…, related school offerings.  Visit the Tinkering Space: The WorkSafeBC Gallery Visit Eureka! GalleryWe believe that now, more than ever, the world needs people who care about science. help us fund the future and next generation of problem solvers, wonder seekers, world changers and nerds.. Your browser is not supportedSorry but it looks as if your browser is out of date. To get the best experience using our site we recommend that you upgrade or switch browsers. Find a solution
Nuffield practical collection
Delve into a wide range of chemical concepts and processes with this collection of over 200 step-by-step practicals Developed by the Nuffield Foundation and the Royal Society of Chemistry, each resource contains detailed information for teachers and technicians.  ‘Dissolving’ polystyrene in acetoneIn association with Nuffield Foundation Investigate what happens to polystyrene when it is placed in propanone (acetone) in this demonstration. Includes kit list and safety instructions.  ‘Magic’ writing with colour changing reactionsReveal invisible messages or pictures drawn with aqueous solutions by spraying them with suitable reagents in this demonstration. Includes kit list and safety instructions.  A chromate–dichromate equilibriumTry this class practical to investigate an equilibrium between chromate(VI), dichromate(VI) and hydrogen ions. Includes kit list and safety instructions.  A controlled explosion using hydrogen and airShow how a hydrogen–air mixture can gain explosive properties using a plastic drink bottle in this demonstration. Includes kit list and safety instructions.  A hydrogen powered rocketTry this spectacular demonstration to make a rocket using a plastic drink bottle fuelled by hydrogen and air. Includes kit list and safety instructions.  A microscale acid–base titrationUse microscale titration to complete an acid–base neutralisation with sodium hydroxide in this class practical. Includes kit list and safety instructions.  A microscale oxidation of alcoholsUse this practical to investigate the oxidation reactions of various alcohols with acidified potassium dichromate. Includes kit list and safety instructions.  A red–blue oscillating reactionUse this practical or demonstration to provide a visual illustration of an oscillating reaction and redox equilibria. Includes kit list and safety instructions.  A reversible reaction of hydrated copper(II) sulfateA class practical which investigates the reversible reaction of hydrated copper(II) sulfate. Includes kit list and safety instructions.  A simple oscillating reactionUse this demonstration to illustrate an oscillating reaction as bromate ions oxidise malonic acid to carbon dioxide. Includes kit list and safety instructions.  A solid–solid reaction between lead nitrate and potassium iodideUse this demonstration with kit list and safety instructions to prove that two solids can react together, making lead iodide from lead nitrate and potassium iodide.  A spontaneous exothermic reactionIllustrate the reaction between glycerol and potassium manganate(VII) to produce flames and steam in this demonstration. Includes kit list and safety instructions.  A test to distinguish between ethanol and methanolA class practical to distinguish between methanol and ethanol using the iodoform reaction. Includes kit list, safety instructions, procedure and teaching notes.  A thermometric titrationUse this class practical to practise locating end-points in titration by measuring temperature during the reaction. Includes kit list and safety instructions.  Acid or alkali? Acidic or alkaline? A litmus paper testTest a variety of substances to see if they are acidic or alkaline, using litmus paper as the indicator. Includes kit list and safety instructions.  Addition polymerisation with phenyletheneUse this practical or demonstration as an example of addition polymerisation using phenylethene to form polyphenylethene. Includes kit list and safety instructions.  Allotropes of sulfurUse this practical to explore the changes in the colour and consistency of sulfur as you heat it, melt it and eventually boil it. Includes kit list and safety instructions.  Ammonia fountain demonstrationTry this experiment to make a miniature chemical fountain using only soluble ammonia and atmospheric pressure. Includes kit list and safety instructions.  Ammonium dichromate volcanoTry this demonstration to create a mini volcanic eruption illustrating the decomposition of ammonium dichromate. Includes kit list and safety instructions.  An equilibrium using copper(II) and ammoniaTry this practical to explore an equilibrium involving copper(II) ions, with copper(II) sulfate, ammonia and sulfuric acid. Includes kit list and safety instructions.  Anodising aluminiumExplore an application of electrolysis in this demonstration by anodising aluminium to improve corrosion resistance. Includes kit list and safety instructions.  Cannon fireIncrease the rate of burning with the inclusion of oxygen, in this loud exothermic practical  Carbon filtration and activated charcoalTry this practical to remove objectionable tastes and odours from water using carbon in the form of activated charcoal. Includes kit list and safety instructions.  Catalysing the reaction of sodium thiosulfate and hydrogen peroxideIllustrate the effect of a catalyst as sodium thiosulfate is oxidised by hydrogen peroxide in this demonstration. Includes kit list and safety instructions.  Catalysis of a sodium thiosulfate and iron(III) nitrate reactionInvestigate the effect of transition metal catalysts on the reaction between iron(III) nitrate and sodium thiosulfate. Includes kit list and safety instructions.  Catalysis of the reaction between zinc and sulfuric acidCompare the rate of reaction between zinc and sulfuric acid with copper as a catalyst in this simple class practical. Includes kit list and safety instructions.  Catalysts for the thermal decomposition of potassium chlorateTry this demonstration to investigate the effectiveness of various catalysts for the decomposition of potassium chlorate. Includes kit list and safety instructions.  Catalytic oxidation of potassium sodium tartrateUse this demonstration to illustrate catalysis of the oxidation of potassium sodium tartrate by hydrogen peroxide. Includes kit list and safety instructions.  Chemiluminescence of luminol: a cold light experimentShow how the energy of a chemical reaction can be given out as light. Includes kit list and safety instructions.  Chromatography of sweets | 11–14 yearsIn association with Nuffield Foundation , By Holly Walsh and Sandrine Bouchelkia Try this class practical to carry out chromatography using dye from different coloured M&M’s®. Includes kit list and safety instructions.  Colourful reactions using ammonia solutionTurn ammonia solution red, white or blue by adding phenolphthalein, lead nitrate or copper(II) sulfate in this demonstration. Includes kit list and safety instructions.  Colourimetric determination of copper oreUse this practical to introduce students to the determination of copper ore by colourimetry using copper(II) sulfate. Includes kit list and safety instructions.  Combustion of ethanolIllustrate the large energy changes that take place during the combustion of alcohols with this spectacular demonstration. Includes kit list and safety instructions.  Combustion of hydrogen in airTry this demonstration or class experiment to investigate how varying amounts of fuel and oxygen affect combustion. Includes kit list and safety instructions.  Comparing heat energy from burning alcoholsInvestigate the amounts of heat energy produced by the combustion of different alcohols in this class experiment. Includes kit list and safety instructions.  Comparing light- and heavy-duty detergentsTry this set of experiments to compare the effects of light- and heavy-duty detergents with different pH values. Includes kit list and safety instructions.  Comparing the melting points of solder, tin and leadTest the melting points of lead, tin and solder to investigate solder as a solid mixture and alloy in this practical. Includes kit list and safety instructions.  Corrosion in different atmospheric conditionsTry this practical to test the corrosion of metals in dry air, moist air and air polluted by acidic sulfur dioxide. Includes kit list and safety instructions.  Cracking hydrocarbons in liquid paraffin with a catalystModel the industrial process of cracking larger hydrocarbons to produce smaller alkanes in this demonstration or class practical. Includes kit list and safety instructions.  Cracking hydrocarbons on a microscaleUse this microscale experiment to illustrate hydrocarbon cracking using paraffin, bromine water and aluminium oxide. Includes kit list and safety instructions.  Dehydration of ethanol to form etheneUse this class practical or demonstration to produce ethene gas as an example of an unsaturated hydrocarbon. Includes kit list and safety instructions.  Detecting starch in food on a microscaleTest different foodstuffs for the presence of starch using iodine in this microscale class practical. Includes kit list and safety instructions.  Detergents, soaps and surface tensionA series of brief experiments on the effects of detergents and soaps on the surface tension of purified and hard water. Includes kit list and safety instructions.  Determining relative molecular mass by weighing gasesUse this demonstration to determine the relative molecular masses of different gases using the ideal gas equation. Includes kit list and safety instructions.  Determining the relative atomic mass of magnesiumUse this practical to determine the relative atomic mass of magnesium using its reaction with hydrochloric acid. Includes kit list and safety instructions.  Determining the relative molecular mass of butaneUse this demonstration to calculate the relative molecular mass of butane using simple apparatus. Includes kit list and safety instructions.  Diffusion in liquidsDemonstrate that diffusion takes place in liquids in this practical using lead nitrate and potassium iodide. Includes kit list and safety instructions.  Diffusion of gases: ammonia and hydrogen chlorideA demonstration to show the diffusion of gases, using ammonia solution and hydrochloric acid. Includes kit list and safety instructions.  Displacement reactions between metals and their saltsStudents will investigate competition reactions of metals and determine a reactivity series of the four metals used. Includes kit list and safety instructions.  Displacement reactions of non-metalsInvestigate a displacement series of non-metals using oxygen and chlorine in this class practical or demonstration. Includes kit list and safety instructions.  Dissolved substances in tap water and seawaterCompare the solids and gases dissolved in tap water and seawater in this class practical and demonstration. Includes kit list and safety instructions.  Distribution of iodine between two immiscible solventsUse this class experiment or demonstration to create an equilibrium distribution using iodine in two immiscible solvents. Includes kit list and safety instructions.  Dyeing three colours from the same dye bathShow how dyeing involves chemical interactions between dyes and the molecular nature of different fibres in this demonstration. Includes kit list and safety instructions.  Electrolysis of brineUse this colourful practical to introduce students to the electrolysis of brine, or sodium chloride solution. Includes kit list and safety instructions.  Electrolysis of copper(II) sulfate solutionExplore the electrolysis of copper(II) sulfate solution and related industrial processes with this class experiment. Includes kit list and safety instructions.  Electrolysis of molten lead(II) bromideIntroduce your students to the study of electrolysis through the production of metallic lead and bromine in this demonstration. Includes kit list and safety instructions.  Electrolysis of molten zinc chlorideTry this demonstration to show how an ionic salt will conduct electricity when molten but not when solid. Includes kit list, video and safety instructions.  Emulsifiers in the kitchenTest a range of common ingredients to see which ones stabilise an oil and water emulsion in this class practical. Includes kit list and safety instructions.  Endothermic solid–solid reactionsObserve an endothermic reaction between two solids in this demonstration or class experiment. Includes kit list and safety instructions.  Energy content in foodsTry this class experiment to investigate how much energy different foods contain. Includes kit list and safety instructions.  Equilibria involving carbon dioxide in aqueous solutionUse this demonstration or class practical to illustrate changes to equilibria in carbonated soda water. Includes kit list and safety instructions.  Estimating the concentration of bleachCompare the chlorine content and concentration of sodium hypochlorite in different bleaches in this class practical. Includes kit list and safety instructions.  Exothermic metal displacement reactionsTry this class experiment to explore what happens when different metals are added to a copper(II) sulfate solution. Includes kit list and safety instructions.  Exothermic metal–acid reactionsUse this class practical to explore the temperature changes resulting from adding different metals to hydrochloric acid. Includes kit list and safety instructions.  Exothermic or endothermic? Classifying reactionsDecide whether various reactions are exothermic or endothermic by measuring temperature change in this practical. Includes kit list and safety instructions.  Exothermic redox reaction of zinc with iodineUsing an exothermic redox reaction between zinc and iodine, student will make zinc iodide. This can be reversed using electrolysis to decompose the compound.  Exploding a tin can using methaneUse this demonstration to illustrate how methane can create an explosive mixture with the oxygen in air. Includes kit list and safety instructions.  Exploding bubbles of hydrogen and oxygenCreate a small explosion in this demonstration by electrolysing water to produce hydrogen and oxygen bubbles. Includes kit list, video and safety instructions.  Extracting copper from copper(II) carbonateUse this practical to produce copper from copper(II) carbonate, modelling the extraction of copper from malachite. Includes kit list and safety instructions.  Extracting iodine from seaweedDiscover how ribbon seaweed (or kelp) can be used as a source of iodine in this demonstration or class experiment. Includes kit list and safety instructions.  Extracting iron from breakfast cerealTry this class practical or demonstration to extract food-grade iron from breakfast cereals using neodymium magnets. Includes kit list and safety instructions.  Extracting metals with charcoalTry this class practical to illustrate the idea of competition reactions between metals and carbon. Includes kit list and safety instructions.  Extraction of iron on a match headTry this practical as a small scale example of metal extraction, reducing iron(III) oxide with carbon on a match head. Includes kit list and safety instructions.  Fat-pan fires and the conditions for combustionUse this demonstration to illustrate the conditions required to start combustion, and how to put out a pan fire safely. Includes kit list and safety instructions.  Fermentation of glucose using yeast | 14–16 yearsIn association with Nuffield Foundation , By Neil Goalby Use this class practical to investigate the fermentation of glucose by yeast and test for ethanol. Includes kit list, safety instructions, questions and answers  Finding the formula of copper(II) oxideUse this class practical with your students to deduce the formula of copper(II) oxide from its reduction by methane. Includes kit list and safety instructions.  Finding the formula of hydrated copper(II) sulfateIn this experiment students will measure the mass of hydrated copper(II) sulfate before and after heating and use mole calculations to find the formula.  Flame colours: a demonstrationExplore how different elements rect when exposed to a flame, and discuss how alkali metals, alkaline earth metals, and metal salts change the colour of fire.  Floating and sinking bubblesMake bubbles of carbon dioxide, hydrogen or methane in this demonstration exploring density, diffusion and solubility. Includes kit list and safety instructions.  Generating, collecting and testing gasesRead our standard guidance on generating, collecting and testing gases during practical experiments, including carbon dioxide, hydrogen, oxygen and chlorine.  Halogen reactions with iron woolIllustrate an exothermic redox reaction by heating iron wool with chlorine, bromine and iodine with this demonstration. Includes kit list and safety instructions.  Halogens in aqueous solution and their displacement reactionsExplore the chemical properties of halogens using this demonstration or class experiment. Includes kit list and safety instructions.  Handling liquid bromine and preparing bromine waterFind out how to handle liquid bromine and prepare bromine water safely using these health, safety and technical notes.  Heating chocolate and eggUse this practical to introduce students to physical and chemical changes and the safe use of Bunsen burners. Includes kit list and safety instructions.  Heating copper in airExplore the reaction of copper with oxygen, producing copper oxide, when a copper envelope is heated in air in this practical. Includes kit list and safety instructions.  Heating group 1 metals in air and in chlorineUse this demonstration to illustrate the reactions of lithium, sodium and potassium in air and in chlorine. Includes kit list, video and safety instructions.  How can hardness in water be removed?Investigate the effects of three treatments for softening hard water in this class practical and demonstration. Includes kit list and safety instructions.  How much oxygen is used when iron wool rusts?Try this practical to investigate how much oxygen is used in rusting and calculate the percentage of oxygen in air. Includes kit list and safety instructions.  Hydrogels in plant water storage crystalsInvestigate plant water storage crystals as one application of hydrogels in this fun class practical. Includes kit list and safety instructions.  Identifying polymers by densityInvestigate and identify a variety of polymers used in everyday materials by testing their density in this practical. Includes kit list and safety instructions.  Identifying the products of combustionIllustrate the presence of water and carbon dioxide in the products of hydrocarbon combustion in this demonstration. Includes kit list and safety instructions.  Identifying the products of electrolysisTry this class experiment to carry out the electrolysis of various solutions and investigate the products formed. Includes kit list and safety instructions.  Indicators and dry ice demonstrationCreate bubbles, ‘fog’ and a colour change adding dry ice to alkaline ammonia or sodium hydroxide solution in this demonstration. Includes kit list and safety instructions.  Investigating hydrogels in nappies and hair gelInvestigate hydrogels as polymeric smart materials in this series of activities using nappies and hair gel. Includes kit list and safety instructions.  Investigating the role of water in acidityTry this practical or demonstration to explore the importance of water for acidity using hydrogen chloride and methylbenzene. Includes kit list and safety instructions.  Investigating the solubility of lead halidesEncourage students to make and test predictions about the pattern of solubility among lead halides in this practical. Includes kit list and safety instructions.  Iodine clock reaction demonstration methodUse this iodine clock reaction demonstration to introduce your students to rates of reaction and kinetics. Includes kit list and safety instructions.  Iron and sulfur reactionThis demonstration or class experiment shows the exothermic reaction of iron and sulphur. Includes kit list and safety instructions.  Leaf chromatographyTry this class practical to use paper chromatography to separate and investigate the pigments in a leaf. Includes kit list and safety instructions.  Liquefying chlorine gasUse this demonstration to produce liquid chlorine and compare it with bromine and iodine in their condensed state. Includes kit list and safety instructions.  Making a crystal gardenCreate chemical gardens with your students by growing crystals of coloured silicates in this class practical. Includes kit list and safety instructions.  Making a pH indicator using red cabbageTry this class practical to make a pH indicator from red cabbage with your students. Includes kit list and safety instructions.  Making a photographic print using silver chlorideTry this practical or demonstration to create a photographic image of an object using light sensitive silver chloride. Includes kit list and safety instructions.  Making and testing ammoniaIn this experiment, students make ammonia, investigate its solubility in water and test its alkaline nature. Includes kit list and safety instructions.  Making esters from alcohols and acidsInvestigate the reactions between a range of alcohols and acids by producing a variety of esters in this class experiment. Includes kit list and safety instructions.  Making glassTry this class practical to make samples of glass using lead oxide, zinc oxide and boric acid. Includes kit list and safety instructions.  Making glue from milkTry this class practical to prepare a polymer glue from milk using the protein casein. Includes kit list and safety instructions.  Making magnesium carbonate: the formation of an insoluble salt in waterStudents react magnesium sulfate and sodium carbonate to form magnesium carbonate, which is insoluble in water. Includes kit list and safety instructions.  Making plastic from potato starchIn association with Nuffield Foundation , By Joanna Buckley Explore bioplastics with an experiment making plastic using potato starch. Lab and non-lab versions available  Making rayonUse this demonstration to produce rayon fibres in the classroom using cotton wool or filter paper. Includes kit list and safety instructions.  Making soaps and detergents using castor oilTry this class practical to make a soap or detergent using castor oil and either sodium hydroxide or sulfuric acid. Includes kit list and safety instructions.  Making solder as an alloy of tin and leadTry this practical to make solder by heating together the metals tin and lead before investigating the alloy’s properties. Includes kit list and safety instructions.  Melting and freezing stearic acidIn this class practical students take the temperature of stearic acid at regular intervals as they heat and cool it. Includes kit list and safety instructions.  Microscale extraction of copperTry this practical to reduce copper(II) oxide to copper using hydrogen, revealing their positions in the reactivity series. Includes kit list and safety instructions.  Microscale reactions of positive ions with sodium hydroxideTry this microscale practical exploring the reactions of various positive ions with sodium hydroxide. Includes kit list and safety instructions.  Microscale oxidation of cyclohexanol by potassium dichromate(VI)Use this quick class experiment to observe the oxidation of cyclohexanol to produce cyclohexanone. Includes kit list and safety instructions.  Microscale preparation of ethyl benzoateTry this class practical to prepare the ester ethyl benzoate on a microscale by warming ethanol and benzoic acid. Includes kit list and safety instructions.  Modelling alloys with plasticineTry this class activity to explore how alloying can be used to change the properties of a metal. Includes kit list and teaching notes.  Modelling the greenhouse effectUse this demonstration to illustrate the greenhouse effect and the role of carbon dioxide as a greenhouse gas. Includes kit list and safety instructions.  Neutralising an acidic solutionUse this simple practical to illustrate the pH and temperature changes as an acidic solution is neutralised. Includes kit list and safety instructions.  Oxidation of ethanolIn this class practical, ethanol is oxidised by acidified sodium dichromate to form ethanal and then ethanoic acid. Includes kit list and safety instructions.  Phenol-methanal polymerisiationMake Bakelite in class and investigate its properties using phenol, methanal and ethanoic acid in this demonstration. Includes kit list and safety instructions.  Preferential discharge of cations during electrolysisUse this practical to show that metal cations are preferentially discharged, in relation to the metal’s position in the reactivity series. Includes kit list and safety instructions.  Preparing a soluble salt by neutralisationIn this practical, students react alkaline ammonia with sulfuric acid to form the soluble salt ammonium sulfate. Includes kit list and safety instructions.  Preparing an insoluble salt in a precipitation reactionProduce an insoluble salt precipitate by reacting two soluble metal salts together in this class experiment. Includes kit list and safety instructions.  Preparing and using cobalt chloride indicator papersMake your own cobalt chloride indicator papers, which can be used to test for the presence of water. Includes kit list and safety instructions.  Preparing salts by neutralisation of oxides and carbonatesTry these class experiments to illustrate the production of soluble salts from insoluble metal oxides and carbonates. Includes kit list and safety instructions.  Preventing rustTry this practical to test methods for preventing rust on iron nails, including painting, greasing and sacrificial protection. Includes kit list and safety instructions.  Properties of alkali metal compoundsTry this class practical to explore the physical and chemical properties of various alkali metal compounds. Includes kit list and safety instructions.  Purifying an impure solidPurify alum as an example of obtaining a pure chemical from an impure sample in this class practical. Includes kit list and safety instructions.  PVA polymer slimeIn this fun class experiment student will make slime by adding borax solution to PVA. Includes kit list and safety instructions.  Quantitative electrolysis of aqueous copper(II) sulfateUse this demonstration to find the value of the Faraday constant from electrolysis of copper(II) sulfate solution. Includes kit list and safety instructions.  Rate of evaporationUse this class practical to measure and compare the rate of evaporation of propanone under different conditions. Includes kit list and safety instructions.  Rate of reaction of potassium manganate(VII) and oxalic acidInvestigate the effect of surface area or concentration on rate of reaction using oxalic acid in rhubarb and potassium manganate(VII). Includes kit list and safety instructions.  Reacting aluminium and iodineIllustrate the spectacular reaction between aluminium and iodine with water as a catalyst in this demonstration. Includes kit list and safety instructions.  Reacting copper(II) oxide with sulfuric acidIllustrate the reaction of an insoluble metal oxide with a dilute acid to produce crystals of a soluble salt in this class practical. Includes kit list and safety instructions.  Reacting magnesium with copper(II) oxideIllustrate reduction, oxidation and the relative reactivity of magnesium and copper(II) oxide in this demonstration. Includes kit list and safety instructions.  Reacting zinc and copper(II) oxideIllustrate competition reactions using the exothermic reaction between copper(II) oxide and zinc in this class demonstration. Includes kit list and safety instructions.  Reactions of chlorine with water or halide ionsGenerate chlorine gas on a microscale and investigate its reactions with water or halide ions in this class practical. Includes kit list and safety instructions.  Reactions of chlorine, bromine and iodine with aluminiumTry this demonstration to produce some spectacular exothermic redox reactions by reacting aluminium with halogens. Includes kit list and safety instructions.  Reactions of metals with acids producing saltsExplore the production of hydrogen gas and salts when metals react with acids in this class experiment. Includes kit list and safety instructions.  Reactivity trends of the alkali metalsUse this experiment to demonstrate the trend in reactivity down group 1 of the Periodic Table, exploring the physical and chemical properties of the alkali metals.  Rechargeable cells: the lead–acid accumulatorUse this practical to demonstrate the chemistry behind rechargeable batteries, using a lead–acid accumulator cell. Includes kit list and safety instructions.  Recovering water from a solution using a condenserUse this demonstration to show how pure water can be recovered from copper sulfate solution using a condenser. Includes kit list and safety instructions.  Recovering water from copper(II) sulfate solutionTry this practical to introduce students to aqueous solutions by distilling water from copper(II) sulfate solution. Includes kit list and safety instructions.  Separating salts from seawaterTry this simple practical to show that seawater contains a mixture of different salts. Includes kit list and safety instructions.  Separating sand and salt by filtering and evaporationTry this class experiment to practise manipulating mixtures of soluble and insoluble materials by separating sand and salt. Includes kit list and safety instructions.  Silver and lead halidesTry this practical or demonstration to produce silver and lead halides in a series of precipitation reactions. Includes kit list and safety instructions.  Sodium ethanoate ‘stalagmite’Quickly grow your own ‘stalagmite’ from a supersaturated solution of sodium ethanoate in this demonstration. Includes kit list and safety instructions.  Solubility patterns of halogen anionsTry this microscale practical to identify and explain patterns in the solubility of fluoride, chloride, bromide and iodide anions. Includes kit list and safety instructions.  Solubility trends of metal halidesInvestigate patterns in the solubility of halides of silver and some Group 1 and 2 metals in this microscale practical. Includes kit list and safety instructions.  Sulfuric acid as a dehydrating agentTry these two demonstrations to illustrate the difference between dehydration and drying using sulfuric acid. Includes kit list and safety instructions.  Supercooling and the energetics of freezingExplore what happens when a liquid is supercooled using sodium thiosulfate in this class practical. Includes kit list and safety instructions.  Testing for catalase enzymesTry this class experiment to detect the presence of enzymes as they catalyse the decomposition of hydrogen peroxide. Includes kit list and safety instructions.  Testing the pH of different solutionsUse this practical to reinforce students’ understanding of pH by preparing and testing acidic and alkaline solutions. Includes kit list and safety instructions.  Testing the pH of oxidesUse this class practical to investigate the pH of different metal and non-metal oxides using a universal indicator. Includes kit list and safety instructions.  Testing the hardness of waterTry this practical with your students to measure the hardness of water samples and investigate the effect of boiling. Includes kit list and safety instructions.  The ‘blue bottle’ experimentIn this demonstration, the redox indicator Methylene blue can be oxidised many times by shaking. Includes kit list and safety instructions.  The ‘breathalyser’ reaction | 16–18 yearsIn association with Nuffield Foundation , By Tim Jolliff and Sandrine Bouchelkia Try this demonstration to recreate an early ‘breathalyser’ test, passing ethanol vapour through potassium dichromate. Includes kit list and safety instructions  The ‘Old Nassau’ or Halloween clock reactionIllustrate dramatic colour changes as a result of redox and precipitation reactions in this vivid demonstration. Includes kit list and safety instructions.  The ‘whoosh’ bottle demonstrationThis exciting demonstration is a combustion reaction where a mixture of alcohol and air in a large bottle is ignited. Includes kit list and safety instructions.  The acidic reactions of ethanoic acidExplore the properties of ethanoic acid as a weak organic acid in this class experiment. Includes kit list and safety instructions.  The change in mass when magnesium burnsA class practical to measure the change in mass when magnesium burns and to find the formula of magnesium oxide. Includes kit list and safety instructions.  The chemistry of cooking potatoesUse this class practical to investigate what happens to potatoes and potato cells when they are boiled. Includes kit list and safety instructions.  The combustion of iron woolTry this quick teacher demonstration to demonstrate the increase in mass as iron wool is heated in air. Includes kit list and safety instructions.  The composition and formula of waterTry this demonstration to determine the formula of water through the reaction of copper(II) oxide with hydrogen. Includes kit list and safety instructions.  The conversion of alcohols to halogenoalkanesTry this practical or demonstration to produce bromoethane in a substitution reaction between ethanol and phosphorus tribromide. Includes kit list and safety instructions.  The cornflour ‘bomb’Create a small explosion inside a tin can using cornflour in this demonstration, illustrating energy transformation. Includes kit list and safety instructions.  The density of carbon dioxideIllustrate the higher density of carbon dioxide relative to air by pouring it over a lighted candle in this demonstration. Includes kit list and safety instructions.  The density of iceDemonstrate to students what happens as ice cubes floating on oil start to melt and the density of the water changes. Includes kit list and safety instructions.  The effect of concentration and temperature on an equilibrium | Le Chatelier’s principleTry this demonstration to illustrate how changing chlorine concentration or temperature shifts the position of an equilibrium. Includes kit list and safety instructions.  The effect of concentration on equilibrium | Le Chatelier’s principleIllustrate the reversible reaction between bismuth(III) oxychloride and bismuth(III) chloride in this demonstration. Includes kit list and safety instructions.  The effect of pressure and temperature on equilibrium | Le Chatelier’s principleTry this demonstration to explore the effects of pressure and temperature on an equilibrium mixture with your students. Includes kit list and safety instructions.  The equilibrium between two coloured cobalt speciesIn this demonstration the equilibrium between two different coloured cobalt species is disturbed. Le Chatelier’s principle is used to predict a colour change.  The formation of a solConvert a rusty-brown precipitate of iron(III) hydroxide into a cherry-red iron(III) oxide sol in this demonstration. Includes kit list and safety instructions.  The fractional distillation of crude oilTry this class practical or demonstration to simulate the industrial fractional distillation of crude oil. Includes kit list and safety instructions.  The migration of ions during electrolysis of potassium manganate(VII)Try this class practical to investigate the migration of ions during electrolysis as evidence for the ionic model. Includes kit list and safety instructions.  The properties of alcoholsEthanol and propan-1-ol are tested for pH, reaction with sodium, combustion and oxidation with acidified dichromate(VI) solution. Includes kit list and safety instructions.  The properties of hydrogen chlorideUse this demonstration and practical to investigate properties of hydrogen chloride, such as its solubility in water. Includes kit list and safety instructions.  The rate of reaction of magnesium with hydrochloric acidA class practical on reacting magnesium with hydrochloric acid and how to measure the rate of reaction. Includes kit list and safety instructions.  The reaction of aluminium and copper(II) sulfateTry this practical or demonstration to illustrate the displacement of copper from copper sulfate using aluminium foil, with kit list and safety instructions.  The reaction of carbon dioxide with waterForm a weak acid from the reaction of carbon dioxide with water in this class practical. Includes kit list and safety instructions.  The reaction of ethyne with chlorineTry this teacher demonstration with your students to illustrate the spontaneous reaction of ethyne and chlorine. Includes kit list and safety instructions.  The reactivity of ironIllustrate iron’s position in the reactivity series by heating it with copper and magnesium oxides in this practical. Includes kit list and safety instructions.  The silver mirror test with Tollens’ reagentTry this practical to explore the mirror-making reaction between silver nitrate (Tollens’ reagent) and glucose. Includes kit list, video and safety instructions.  The structure and properties of chocolateInvestigate how melting chocolate changes its structure and affects properties like taste, texture and melting point. Includes kit list and safety instructions.  The sublimation of air freshener | 11–14 yearsIn association with Nuffield Foundation , By Dorothy Warren Use this experiment to demonstrate sublimation, showing how solid air freshener changes directly from a solid to a gas. Includes kit list and safety instructions.  The thermal properties of waterExplore water’s boiling point, specific heat capacity and thermal conductivity in this demonstration. Includes kit list and safety instructions.  The thermite reaction between aluminium and iron(III) oxideIllustrate a highly exothermic thermite reaction resulting in molten iron in this teacher demonstration. Includes kit list and safety instructions.  Thermal decomposition of calcium carbonateA class practical on the thermal decomposition of calcium carbonate. Includes kit list and safety instructions.  Thermal decomposition of nitrates: ‘writing with fire’Make an invisible message ‘glow’ by applying a lighted splint to filter paper treated with sodium nitrate in this demonstration. Includes kit list and safety instructions.  Thermal decomposition of metal carbonatesUse this class practical to compare the thermal stabilities of carbonates of reactive and less reactive metals. Includes kit list and safety instructions.  Titrating sodium hydroxide with hydrochloric acidUse this class practical to explore titration, producing the salt sodium chloride with sodium hydroxide and hydrochloric acid. Includes kit list and safety instructions.  Turning ‘red wine’ into ‘water’Use acidified potassium permanganate – or ‘red wine’ – to make ‘water’, ‘milk’ and ‘lemonade’ in this engaging demonstration. Includes kit list and safety instructions.  Turning copper coins into ‘silver’ and ‘gold’Perform what looks like alchemy with ordinary copper coins in this teacher demonstration. Includes kit list and safety instructions.  Universal indicator ‘rainbow’Try this demonstration to create a rainbow effect using universal indicator, hydrochloric acid and sodium hydroxide. Includes kit list and safety instructions.  Unsaturation in fats and oilsUse this class practical to investigate the amounts of unsaturated fats and oils in different foods. Includes kit list and safety instructions.  Urea-methanal polymerisationExplore condensation polymerisation by creating and investigating the properties of a thermosetting polymer in this demonstration. Includes kit list and safety instructions.  Using indigestion tablets to neutralise an acidInvestigate and measure the neutralising effect of indigestion tablets on hydrochloric acid in this class practical. Includes kit list and safety instructions.  Water expands when it freezesUse this demonstration to show that water expands when it freezes, showing students how it can break a bottle. Includes kit list and safety instructions.  What are the dissolved solids in seawater?Analyse the salts that crystallise from evaporating seawater, illustrating cation and anion tests in this demonstration. Includes kit list and safety instructions.  What causes iron to rust?Use this class experiment to help students investigate what conditions are needed for iron to rust. Includes kit list and safety instructions.  What ions cause hardness in water?Investigate how different cations and anions in dissolved salts affect the formation of a lather in this experiment. Includes kit list and safety instructions.  What makes a substance acidic?Try these experiments to investigate acidity and learn how the acidic properties of some substances require water. Includes kit list and safety instructions.  Where is carbon in the reactivity series?Determine the position of carbon in the reactivity series by heating with metal oxides in this practical and demonstration. Includes kit list and safety instructions.  Which substances conduct electricity?In this class practical, students test the conductivity of covalent and ionic substances in solid and molten states. Includes kit list and safety instructions.  Yeast and the expansion of bread doughTry this class practical to investigate how temperature affects yeast and the expansion of bread dough. Includes kit list and safety instructions.
Site powered by Webvision Cloud Abandoned Plastic Bottles May Be 'Drano Bombs'?Homemade bombs made of aluminum foil and popular drain cleaner drano have posed a threat to public safety since at least 2010., taija perrycook, published sept. 19, 2024.  About this rating Here at Snopes, we are all too familiar with baseless , fearmongering posts on Facebook . Sometimes, however, these rumors actually have merit. Back in 2010, we investigated a claim that homemade bombs – made out of popular drain clog remover Drano and aluminum inside a plastic bottle – presented a real danger to the public. More recently, social media posts warning about the phenomenon were once again circulating on Facebook and in our mailbox in mid-September, 2024. One particularly popular copypasta read as follows: Kids are putting Drano, tin foil, and a little water in plastic drink bottles and capping it up - leaving it on lawns, in mail boxes, in gardens, on driveways etc. just waiting for you to pick it up intending to put it in the rubbish, but you'll never make it!!! If the bottle is picked up, and the bottle is shaken even just a little - in about 30 seconds or less it builds up enough gas which then explodes with enough force to remove some your extremities. The liquid that comes out is boiling hot as well. Don't pick up any plastic bottles that may be lying in your yards or in the gutter, etc. Pay attention to this. A plastic bottle with a cap. A little Drano. A little water. A small piece of foil. Disturb it by moving it; and BOOM!! No fingers left and other serious effects to your face, eyes, etc. Please ensure that everyone that may not have email access are also informed of this. Share this with everyone you know The warning was indeed true; dozens of official police notices and news clippings over the years have reported on these homemade bombs posing a real danger to anyone who accidentally comes into contact with them. "Drano bombs," as they are commonly known, have the power to sever fingers, cause second and third degree chemical burns, and induce blindness. Since at least 2010 , local police stations have encountered Drano bombs in people's front lawns , on playgrounds , and on sidewalks . In 2012, a safety alert went out to all 76 police precincts across all five of New York City's boroughs. "These devices, sometimes called 'Drano bombs' or 'bottle bombs,' are exploded by mixing readily available household products in plastic containers," it read. Drano bombs have seriously injured many people as a result. For example, in 2017, one such device severely burned a 12-year-old girl in Harlem, New York, when she kicked the object on a playground, thinking it was only a bottle of soda. "My main issue is to get the word out so, being aware of this new chemical bomb these children are creating copying off YouTube," her mother said. In 2018, we posted the following video on X, further illustrating how extensive this public safety issue was. Fact Check: Are people leaving Drano bottle bombs in unsuspecting residents' yards? Full Report: https://t.co/6KV4TCqPq2 pic.twitter.com/o9lcODCj6k — snopes.com (@snopes) June 17, 2018 Most recently, a series of explosions in Ohio in August 2024 appeared to have been caused by Drano bombs, according to the Streetsboro Police Department, however the official results from the lab had not been reported as of this writing. "It looks like a Drano bomb, but we are not bomb experts, so the lab actually has to tell us what it was made out of," police chief Tricia Wain said. "The closest thing we can describe it as is a Drano bomb, which unfortunately is pretty easy to build." On one online forum , a responder to a question regarding the potential danger of Drano bombs explained that sodium hydroxide – the active ingredient in Drano, commonly known as "lye" – reacts with aluminum to produce hydrogen gas.  (stackexchange.com) In sum, Drano bombs have been extensively documented, are very real, and are very dangerous. As we reported in 2010, police recommend: 1) If you find a soda bottle or any other bottles, examine it carefully before you touch it or get near it. If it shows signs of swelling, or melting in any way, DO NOT TOUCH IT! Call 911 and let us respond to take care of it. 2) If you find a soda bottle that has any liquid in it, DO NOT TOUCH IT! Call 911 and let us respond to check it / dispose of it. Baker, Al. 'Officers Are Advised to Look Out for "Bottle Bombs"'. City Room , 1334261284, https://archive.nytimes.com/cityroom.blogs.nytimes.com/2012/04/12/officers-are-advised-to-look-out-for-bottle-bombs/. Hyde, Kendall. 'Man Accused of Throwing "Drano Bombs" at Ex-Girlfriend's Home'. Https://Www.Fox19.Com , 20 Sept. 2022, https://www.fox19.com/2022/09/20/man-accused-throwing-drano-bombs-ex-girlfriends-home/. 'If You See A Bottle With Aluminum Foil In It, Back Away And Call The Police | On Air with Ryan Seacrest'. Trending , https://onairwithryan.iheart.com/featured/that-s-so-me-for-viral-videos-water-cooler-convos-epic-wins/content/2018-02-16-if-you-see-a-bottle-with-aluminum-foil-in-it-back-away-and-call-the-police/. Accessed 18 Sept. 2024. Mikkelson, David. 'Abandoned Plastic Soda Bottles May Be Drano "Bottle Bombs"?' Snopes , 27 Apr. 2010, https://www.snopes.com//fact-check/drano-bottle-bombs/. Name, Fake. 'Answer to "Can Drano in Water Bottles Cause an Explosion?"' Skeptics Stack Exchange , 21 Aug. 2011, https://skeptics.stackexchange.com/a/5859. 'Police Warn of Pop Bottle Bombs Left in Yards in York Township'. AnnArbor.Com , http://www.annarbor.com/news/police-warn-of-pop-bottle-bombs-left-in-yards-in-york-township/. Accessed 18 Sept. 2024. Warning: Soda Bottle Bombs . https://www.cityofkokomo.org/departments/police_department/warning_soda_bottle_bombs.php. Accessed 18 Sept. 2024. 'What We Can VERIFY about "Drano Bombs"'. Verifythis.Com , 27 Sept. 2023, https://www.verifythis.com/article/news/verify/national-verify/what-we-can-verify-about-drano-bombs/536-b33a9b2a-372e-41e7-8252-5542771367bf. By Taija PerryCookTaija PerryCook is a Seattle-based journalist who previously worked for the PNW news site Crosscut and the Jordan Times in Amman. Article Tags | ||||||||||||||||||||||||||||||||||
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In this simple experiment, students observe as a large tin fitted with a press-on lid and a glass chimney is filled with methane. When the gas is lit at the top of the chimney, the flame burns down and causes the methane-air mixture in the tin to change composition. After a while, an explosive mixture is reached and the lid of the tin is ...
• Metal coffee can with a snug fitting lid. Make a 10mm hole in the lid and a similar sized hole at the bottom of the can that a rubber gas tube can just fit through • Some plasticine to improve the seal • Splint • Bunsen burner • Safety screens • Tripod • Goggles Experiment 1: Exploding Can An unexpected bang demonstrates the
My favorite first day demonstration/activity for chemistry is to do the exploding can! Using methane and an old tin can, show an exciting and not exactly pre...
This is a demonstration of the "Exploding Can" experiment. An empty coffee tin has a hole in the top and bottom. The can is filled with methane from the gas ...
Step 2. Place the can directly on a burner and turn up the heat. This works on an electric cooktop and a gas cooktop, but if you have an induction cooktop, you will need to place the can in a saucepan. Wait until the water in the can boils vigorously.
we can use Hess' law to arrive at the enthalpy value. Assume that air entering into the can is at 25 °C and has a mole % composition of 78% N 2 and 21%O 2. Assume an atmospheric pressure of 745 torr. Assume a lid mass of 57.7 g Assume that the can has a cross sectional area = lid area = 156 cm2 Assume that the can's volume is 3.72 L.
1. Water is a liquid below1000C and a gas (steam, water vapour) above 1000C (ie the boiling point of water is 1000C (at sea level) 2. Water expands to approximately 600 times its liquid volume ...
Spontaneous combustion- exploding can. Obtain a large empty tin of coffee and make a small hole in the lid. Make a hole at the base of the tin large enough to fit a rubber tube. Insert the rubber tube to the base of the tin and secure the other end to the gas outlet. Turn on the gas outlet and ignite the gas escaping from the top of hole in the ...
Making nylon: the 'nylon rope trick'. The 'nylon rope trick' is a classic of chemistry classrooms, by mixing decanedioyl dichloride and in cyclohexane you can create a solution that will form nylon strings when floated on an aqueous solution of 1,6-diaminohexane. Kit list and safety instructions included.
Activity 3. Tin Can Telephone. A classic activity is to make a telephone using two tin cans and a piece of string. Gather: two clean, empty cans with the tops removed (or plastic cups work, too) nail. hammer. goggles (for eye protection while hammering nail into can)*. string at least a few feet long.
Collapsing Can. The collapsing can demo is one I loved seeing for the first time when I was at school, although my teacher used a tin with a screwed down lid which took a little more time to cool down. In some ways I prefer the version using a can with a screw lid because the additional waiting time makes for an even more dramatic "collapse".
Create a small explosion inside a tin can using cornflour in this teacher demonstration. In this experiment, students observe what happens when cornflour is sprayed into the flame of a candle burning inside a large tin can with the lid on. The resulting small explosion caused by rapid combustion of the cornflour blows the lid off the tin.
250 ml water to a 5 gallon can; 20 min to boil, 1 or 2 min to collapse. Collapsing will take longer if the can is left to heat longer and it itself gets hot. Requires a large hotplate. Safety If using a large can do not continue heating the can after inserting the rubber stopper as pressure will increase.
Charles's Law: The Incredible Imploding Can. Let's do another demonstration. You'll need a brand new, never used, metal can with a screw-on cap. Remove the cap, place the can on the stove, and turn it to "high." After the can has been heated for about two minutes, take it off the stove with metal salad tongs and tightly screw on the cap.
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Make it. Put a spoonful of tap water into the can. The exact amount is not important. Fill your bowl with cold water. Add ice as well. Place the can on the gas burner, or use the tongs to hold it over a Bunsen burner. Turn it on. WARNING: Only adults should be doing this step. Make sure you have an extinguisher nearby and that nobody touches ...
Observe how the can gets crushed. Explanation 1: When the water in the tin is boiling, the space in the tin is filled with hot water-vapour. The dipping in the water cools the vapour down. The pressure of the vapour in the tin decreases and the atmospheric pressure crushes the tin. Explanation 2: By boiling the water, the air in the tin is ...
In this experiment, students observe as a large fizzy drink bottle, from which the base has been removed, is filled with hydrogen. The hydrogen is allowed to burn at a small jet in the stopper of the bottle. As the hydrogen-air mixture changes in composition, an explosive mixture is reached, which students can witness exploding with a load bang.
Details. In this activity, students make a Tin Can Toy with a secret mechanism, while exploring kinetic energy. When you roll a Tin Can Toy away, it comes rolling back! Adapted from GEM this Tin Can Toy made of a coffee can contains a simple elastic powered motor. The "secret" to the Come-Back Can is in the weight that hangs from the rubber band.
The Physics of the Imploding Can Experiment. One of the popular demonstrations of atmospheric pressure in introductory physics courses is the "crushing can" or "imploding can" experiment. 1-4 In this demonstration, which has also been extensively discussed on the Internet, a small amount of water is placed in a soda can and heated ...
Over 200 tried and tested classroom practical experiments which aim to develop understanding of a wide range of chemical concepts and processes. They are mapped to clearly identify which area of the curriculum they help to cover ... Exploding a tin can using methane. ... Create a small explosion inside a tin can using cornflour in this ...
Kids are putting Drano, tin foil, and a little water in plastic drink bottles and capping it up - leaving it on lawns, in mail boxes, in gardens, on driveways etc. just waiting for you to pick it ...