And don't worry, I give the science behind it all! Science: Project Cleaning Pennies Question: What products clean pennies the best? All you need is a couple of old copper coins, some different liquids and a few other tools. Recently, we did thisCleaning Pennies Experimentand the results were surprising to my kids. Since we have 6 different liquids here, its best to properly label each cup. There is a second stage to this experiment that you can also try out, and the only extra materials you will need is two more old pennies and some more paper towels. You can find this page online at: https://www.sciencebuddies.org/stem-activities/shine-bright-like-apenny. (Optional) Dip one piece of pH paper in each solution (it turns more blue for basic liquids and more red for acidic ones), let it dry, and label which liquid it was dipped in. Teacher Notes: Regarding, : 1 colour page Ketchup also contains a lot of salt, which helps add to its acidity. 12-Page Colour Download: Please supervise your children during all activities. If this experiment is being used for a science fair or class presentation, the young scientist has the option to either take photos of each penny with a label for which solution was used or even to bring the pennies themselves in. The "Penny Cleaning Experiment" is a product that provides a fun and educational activity for children and adults alike. Pennies rust overtime. My kids had fun doing this, raiding their piggy banks to find some dirty pennies. 1/2 cup vinegar. I needed a quick science activity. Try more solutions. The classic coin cleaning experiment is an easy and affordable way to get your kids interested in science. You can actually do lots of simple science experiments at home with just a few basic supplies. The word "tarnish" refers to the dull or gray-green coloration found on some older pennies. Science Activity: Turn Old Pennies Bright and Shiny! | Exploratorium Its acid! 2023 Leaf Group Ltd. / Leaf Group Media, All Rights Reserved. Pre-made digital activities. Put 1 tablespoon of Vinegar and 1 teaspoon of salt into each Vinegar cup. Penny lab experiment conclusion. A great way to do this is by doing fun science experiments with your kid at home. Extra: Can you think of other safe household acids you could test? The cookie settings on this website are set to "allow cookies" to give you the best browsing experience possible. Use your paper towels to gently dry off each penny, then place it in the corresponding square of your table. Mix one tablespoon of salt with half a cup of vinegar in a small container and stir until the salt dissolves. The step-by-step instructions included in this digital product are easy to follow and are accompanied by colorful illustrations that make the process even more engaging. When you are done with this fun experiment, check outMaking Pennies Green. Most of the liquids (except the water) should have somewhat cleaned the coin. Go back to the table you drew. After the 10 minutes have passed, use the tweezers to take the coins out of each cup. I'm giving you a shout out on the post. Once you have the pennies, pour some of the soda into the glass. 'Fire Water Balloon, ' link: How to Clean Sunglasses Without Scratching Them. Dry the pennies with a paper towel. Experiment with even longer periods of time with each of the cleaning methods. Wait about 5 minutes, then remove the pennies from the solution. We had a blast, a physical example of chemical weathering, by looking at how the soda coke (or a generic version), . See a penny pick it up, all day long youll have good luck! maybe youve heard this phrase before, and maybe youve even stopped to pick up a lucky penny off the sidewalk. Aplus Education Ltd with Vaughan M Blaney, Students love to collect and bring in a dirty, it and why using the scientific method! ), 2 tablespoons freshly squeezed Lemon Juice, 2 tablespoons Tabasco Sauce (or other hot sauce), 11 plastic cups (small Tupperware containers or bowls will work as well). Hi! Set one penny aside to act as your control. Younger kids might need a bit of help. The unlikely condiment you need to be sure to include? What is the optimal time to leave the pennies in the cleaning solution? But heres the question that Im sure is brewing in your mind. 2023 LoveToKnow Media. We talked about the materials used for making, and the process of oxidation. You can watch them change for the first few seconds. Lesson and Program Overview: 2 colour pages Place a square of clean, white paper towel in front of each cup. Coke contains phosphoric acid that cleans the oxides. Start a 1 minute timer. How to Wash Rothy's Shoes & Flats & Keep Them Odor Free. Begin the experiment by placing a few pennies on a small plate. Its a great way to get their young minds critically thinking, and also challenges them to solve problems using logic. The vinegar cleans the penny due to the acid in the vinegar. But somewhere along the way, those pennies lose their luster. In the first cup, put plain water. We use cookies to ensure that we give you the best experience on our website. The chlorine ions bond with the copper in solution forming some sort of copper chloride, allowing the acid to break more of the copper oxide free from the penny. This will help them develop into highly skilled individuals and prepare them for more difficult situations they are sure to encounter later on in life. Seven Layer Density Column Science Experiment, Exploding Popsicle Stick Bomb Tutorial An Energy Experiment For Kids. The next day, pour the soda out of the glass, careful to leave the pennies. Start with the cups labeled 1. Fill the eyedropper with water from the water beaker and carefully count the number of drops that fit on the penny until the water spills over the edge. Remove the pennies and rinse them with water. Step 2: Dip one penny halfway into the liquid. Well, after you wash the ketchup off, that is. ', ' link: Have additional paper towels available to wipe off any remaining solution from the pennies. Check the ingredient list for your Ketchup and Tabasco sauce some of the labels might list vinegar or citric acid, while others might say tomato puree. Then write and draw your observations. Can you clearly see the date on the penny, or is it too dirty? After all the pennies have soaked for about five minutes, it is time to pull them out. If you are looking for a fun and engaging way to keep kids passionate about learning, check out Groovy Lab in a Box. Pop another coin in both the ketchup and vinegar and salt mixture. After quite some time, or after exposure to an acid, pennies will formcopper sulfate, carbonate, and chloride salts, which gives pennies a green color. Pour enough of each solution into its corresponding dish to cover the pennies (it doesn't take much). Take the penny from the Ketchup,1 minutes square of your table, and place it in the Ketchup 1 cup. From Dull to Dazzling: Using Pennies to Test How pH - Science Buddies The lab instructions are easy to follow and provide step-by-step guidance on how to conduct the, 5-IN-1 BUNDLE (Set 1 of 10) - Grades 4,5,6, What is in this '5-IN-1 BUNDLE'? also after an hour of the salt and vinegar, the salt made the coin super duper weird and worse. What Juice Cleans Pennies Best Science Fair Projects Adding salt to any of the acids (lemon juice, vinegar, etc) makes this acid cleaning more effective by creating free hydrogen atoms in the solution, which increases the acid's strength. None of our pennies were dull anymore, and some were downright shiny! 'Elephant's Toothpaste, - Lesson 4 of 50 - Grades 4,5,6 Check it out. If you have a camera, take a picture of the pennies. Therefore, acids are the best kind of liquid to use to clean coins as it easily dissolves the copper oxide that coats old coins and makes them look new and shiny again. About half way filled is fine. Discover the quickest ways to keep your Air Force 1s looking like they're fresh out of the box. If you want things to be fun and messy, you can always have your kids use their hands as long as you are happy to deal with the consequences of ketchup-coated fingers! Thanks for sharing! 9 Easy Grill Cleaning Tips to Keep Mealtime Fresh, At least two of the solutions from the above list, One penny for each solution plus one extra, One small dish or cup for each solution (plastic or paper cups with a couple inches off the top cut off will work if there aren't drinking glasses to spare). This will allow you to make a better judgment of how well each method cleaned, by looking at the pennies before and after their treatment. The negatively charged oxygen atoms in our air are attracted to the positively charged copper atoms in the penny. 4. Afterwards, put one old coin in each cup. For example, ask them if they know you can clean pennies, why you should clean pennies, and what would be the best thing to use to clean pennies? Put 1 tablespoon Tabasco into each Tabasco cup. If you continue to use this site we will assume that you are happy with it. Place your pennies in a shallow bowl, and cover them with lemon juice. Here is the full list so you can tick them off with your kids as you collect them: When it comes to what liquids you and your kids can use in this experiment, part of the fun is asking them what they think would be good to use and trying it out. Experiments on Cleaning Pennies | Sciencing Line these cups up in a row. It is a step-by-step, that the students can perform on their own. You are going to challenge your children to clean pennies with various kitchen condiments. Shine Bright Like aPenny! - Scientific American When the vinegar cleaned the coin, it stripped away the coating and exposed the copper. I believe learning should be enjoyable and engaging. The liquids didnt clean the coins in 10 minutes so I think it needed to be for longer! Compare the penny from the ketchup to the control penny. KetchupSoak your pennies in ketchup to clean them like new. Explore this article things needed 1 Preparation 2 Collect pennies of varying color Collect pennies of varying color. Cleaning Coins Experiment [Procedure And Explanation] - Gally Kids by Brenda Priddy | Jul 12, 2017 | Homeschool |. They will need one tarnished, dirty-looking penny for every solution chosen plus one extra as a control (meaning that nothing will be done to this final penny). Tomatoes contain naturally occurring citric acid, another acid that is generally slightly weaker than vinegar or lemon juice. . You don't have to do the 2nd one, but it's also a good scientific experiment and you'll even find out why the Statue of Liberty is the color that it is. Wipe the excess ketchup off the pennies, then rinse them off. The kids had a lot of fun and the sorting sheet helped keep the organized and on track. Leaving your pennies in the cleaning solution longer gives the reaction more time to continue, and gives you shinier pennies! TEN Quick and Easy Science Experiments for Kids! While still scrubbing with the toothbrush, rinse the penny with room temperature water. Place your 'Control, 1 minutes' penny into the 'Control 1' cup. Next, drop in a dirty penny and stir. This is because copper reacts to oxygen in the air and it turns into a compound called copper oxide. Here's what a young scientist will need to get started: In order to perform this simple experiment, do the following: Once the results are in, talk to the child about which pennies look the cleanest and if they can see any patterns regarding which solutions seemed to do the best job. Science - Lesson 6 of 50 - Grades 4,5,6, my middle school special education classroom. All you need for this science experiment are vinegar, salt, a glass jar, and dirty pennies.1. You dont have to stop after doing this once. Put 1 tablespoon of Lemon Juice and 1 teaspoon of salt into each Lemon cup. It also helps them practice graphing, determining independent and dependent variables, and analyzing experimental results. Get rid of dirt, oil, rust, and debris with a regular garage floor cleaning and maintenance routine. You simply place a, in three types of solutions, I chose water, soap/water, and salt/vinegar but you can change the solutions if you like (the sheet is editable). How does time affect the cleanliness of the pennies? Can you think of other safe household acids you could test? It does this by using the low levels of acids that are contained naturally in vinegar and lemon juice to remove the patina (brown oxidation) on the penny. Rocking Chair, Glider, or Recliner for the Nursery: Is It Worth It? Copyright 2002-2023 Science Buddies. Again, make sure the penny is completely covered by Ketchup. Chemistry Experiments With Pennies - ThoughtCo This bluish-green color is called Malachite. The soda cleans the pennies because it contains phosphoric acid. When printing this document, you may NOT modify it in any way. Science - Lesson 3 of 50 - Grades 4,5,6 This experiment can be performed with things generally found around the house, so it's a great choice for even a quick rainy day project. Instructions. This product is designed to teach people how to clean old, tarnished, using simple household items such as vinegar and salt. Students try to figure out how many drops of water can fit on a, , and also test which types of water work best (Tap water, Salt water, Soapy water). Step 3: Dump all the pennies into the liquid. Carefully remove each penny from its solution. Cleaning Pennies Science Experiment for Kids - Raising Lifelong Learners Hypothesis: If I use 4 different products to clean pennies, adding each product to the a plastic dish (not mixing together), I predict that out of the 4 products, ketchup, fabuloso, coke, and lemon juice that lemon juice will clean a penny the best. Teachers- the materials are readily available! Salt and vinegar mixed together creates a chemical reaction to form hydrochloric acid, which is far more acidic than vinegar alone. It included a shiny new coin, one blackened and covered in ver, Smart Board Lesson for Beginning Learners, Introduce your students to the process of scientific experimentation, lesson. No, the scientific method isnt a chore. Lesson Cover: 1 colour page You should have observed that each cleaning method made the pennies cleaner, but some methods may have been more successful than others. Just put the coins on the tea towel and leave it to air dry. To get your kids involved, ask them a few questions about pennies and cleaning them. MAKE IT AN EXPERIMENT. All rights reserved. So if you look at the coin in the vinegar solution, it made the old coin a little bit brighter and less brown. Now, when copper reacts to oxygen, it turns dark brown to make copper oxide. The "Penny Cleaning Experiment" is a product that provides a fun and educational activity for children and adults alike.This product is designed to teach people how to clean old, tarnished pennies using simple household items such as vinegar and salt. Make your own mix of vinegar and salt at different concentrations. Medioimages/Photodisc/Photodisc/Getty Images. 'Dry Ice Bubble, - Lesson 3 of 50 - Grades 4,5,6 chemistry, kitchen science experiments, coin experiments. Doing a simple science experiment with them now and again helps encourage them to ask questions and learn, as well as improve important life skills like communication, critical thinking, and problem solving. Begin your control experiment. CLEAN PENNIES WITH VINEGAR - ScienceBob.com The vinegar + salt mixture and the ketchup will have come out as the clear winners. Once all your liquids have been poured into their own cup, you can have your kids drop one old coin in each liquid and leave them submerged for 10 mins. (Check out some cool Brainpop, Generation Genius, or Flocabulary videos for extra background knowledge) Your class will then, :- Teacher directions- vocabulary cards- 5 written response questions- border and borderl, 7 Easy Science Experiments To Teach The Scientific Method Bundle, Fun Experiments with Scientific Investigation Bundle. Were there any cleaning methods where the time didnt matter, so the 1 minute and 5 minute pennies are equally clean? If you have chosen to do the extra second step with your kids, then you will have noticed upon your frequent checks that the coins will have turned a blue-green color after being left to air dry. This one is exciting, low prep, and engaging. However, in each case, the cleaning method that worked best for you is the one that has the highest concentration of acid. The coins that were submerged in those cups should come out nice and shiny, while the rest are still a little dull and dirty. Toasted Italian Sandwich - Food Fun Friday. Place the penny (tails side up) on a flat surface. Penny Lab webapi.bu.edu 2022-10-29 . Required fields are marked *. This lab activity aims to explore the concept of surface tension by examining the amount of water that can fit on the surface of a, without overflowing.The lab activity comes, , an eyedropper, and water. Hypothesis: If I put a copper penny in coca cola, soap and water,. Dish soap. Pennies are good for more than just buying penny candy. And be sure to share these additional fun learning activities with your kids! Answers to, Questions: 1 colour page Which solution will clean copper pennies the best, soap and water, Lemon Juice , vinegar and salt, coca cola, or ketchup? Label each cup with a pen so you and your kids know what liquid is in each up. What happened to the coins when air dried? Add the salt, and stir until the salt is completely dissolved. A questionable aspect of this experiment is arisen with the change of the color of ammonia during the experiment. If you're cleaning metals like copper or brass with lemon juice over the long term, this can react with the metals and can cause corrosion, damaging the metal. This way, you wont mix up the coins when it comes to comparing them. There are two different stages to this Science activity. In this activity, were going to test a few different methods for cleaning pennies, and determine which gets our pennies the cleanest. Set one penny aside to act as your control. Rank your solutions from which cleaned the penny the best, to which cleaned it the worst. Pour cup of baking soda into one of your plastic cups. Now closely look at each coin. Which one is the cleanest? Well, heres something even more fascinating. Your Materials For This Science Experiment & Steps Combined. Record your results; photographs are helpful. 'Fire Water Balloon, 25-IN-1 BUNDLE (Set 1 of 2) - Grades 4,5,6, What is in this '25-IN-1 BUNDLE'? Wipe the penny off with a paper towel and rinse off. So when the coin stays in your pocket or is passed from person to person or stays in that container where you keep all your pennies, the copper in the coin reacts with the oxygen in the air and turns into what is called copper oxide. What is the optimal time to leave the pennies in the cleaning solution? Get your copper coins out of the containers where theyve been hiding for many years and get them cleaned. Over time, pennies form a layer of copper oxide on the surface of the penny, which actually protects it from further corruption. follow up activities, 10 graphing activities for graphing the hypothesis. Through the data and . Leave the coins in the liquid for 10 minutes. Try leaving the pennies in the solutions for different lengths of time. Conclusions - Cleaning Pennies Cleaning Pennies Home The project that I made, consisted in cleaning up old and dirty pennies. From Dull to Dazzling: Using Pennies to Test How pH Affects Copper Corrosion, Rustin Out: How Acids Affect the Rate of Corrosion, ! Next should either be the soda/fruit juice or vinegar (sometimes these switch depending on what type of each you have used) because their pH is usually around 3, so they are mildly acidic. So 1st cup will have catsup, 2nd will have coke, and so on. When the penny is clean, remove it, rinse it with fresh water, and set it aside to dry. Once all of the pennies have been rinsed, use your fingers to gently scrub the pennies one at a time with your baking soda paste (keep your gloves on for this part!). To remove this tarnish, an acid needs to be used to weaken the bonds between the copper and oxygen atoms. Penny cleaning science projects are a popular choice at grade school science fairs - and for good reason. This will help them understand whats going on. The salt helps speed up the reaction. Remove pennies and place them on a paper towel to dry. The salt and acetic acid in vinegar do the trick. So we proceeded to read the other ingredients and guess what we found? Chemical reactions, acidity, copper oxidation. Keep trying, keep asking why, and keep learning. This spectacular 5-IN-1 BUNDLE: (Presidents' Day) Water. I have an easy science experiment for you today. As you are drying them, you'll notice that rubbing results in some of the dirt coming off the pennies. Smell), Science Fair Project For Kids: Demonstrating How Plants Help Stop Soil Erosion, 10 Great Inventors Books To Inspire Young Children, DIY Bath Bomb for Kids Fun Science Experiments For Kids, Best Books To Get Your Kids to Fall in Love With Math Teach Approved, 5 old copper pennies (these coins need to be copper for this experiment to work), 5 strips of paper (for labelling each penny), A pen and paper for jotting down the results, 5 different liquids to use to clean your pennies. As in ketchup, salt and vinegar are both in hot sauce. 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Take the dirty copper pennies (the ones from the bottom of your purse are best) and have your child place one into each cup. Salt is another compound called sodium chloride, so it contains a chemical called chlorine (like what we use in swimming pools to keep them clean). The answer is pretty simple before 1982, pennies were made almost entirely from copper, and modern pennies are made of copper-plated zinc. This is a weak acid, which is good since we ingest it. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. It was originally a dark brown color because it was made out of copper and over many years, it has slowly turned blue-green because the copper has transformed into malachite! Conclusion: The hypothesis was proven true, and the pennies, were best cleaned by the strongest acid, which in this experiment was lemon juice. Let the pennies sit in the soda overnight. The child might decide to pick a winning solution or even to rank the pennies in order of which is the most improved. We laid our pennies out to look at them and were surprised with the results. (Dont believe me? Not only will this, Use this observation handout when experimenting. The acid in vinegar, like in citrus, is what really takes the tarnish away. Hot Sauce Hot sauce, like Tabasco or taco sauce, also will remove the oxides off pennies. And see whats the sciencebehind this phenomena. Do you notice any changes in the contents of the cups is anything bubbling, or changing color? Stir until the salt dissolves. Science - Lesson 4 of 50 - Grades 4,5,6 Repeat steps 2-8 with the pennies in your 5 minutes column. Avoid unsightly marks and scratches by learning how to clean sunglasses the right way. In this activity you experimented with 4 different cleaning methods to determine which was the most effective at cleaning pennies. Look for pennies made before 1982 and roughly about the same time; this way they will be more tarnished and the pennies will have similar composition. Step 4: Each step is clearly outlined and explained. We would recommend you use any liquids from the following list for the best results: Now, you can get to the fun part carrying out the experiment! The pennies get shiny because the copper oxide is being stripped off by a reaction, which results in increasing levels of copper in the liquid. Also, Copper oxide easily dissolves in acid. Note: Some of the links on this page are affiliate links. Gently wipe off any excess solution with a paper towel. Students will practice NGSS skills such as asking questions, planning and carrying out an investigation, and analyzing and interpreting data. This is one reason that the pH papers can be a helpful tool. Why do pennies get dark and dingy? We are actually performing a chemical reaction that breaks down the copper oxide. Its not just dependent on how old the pennies are. For my class, I just had to explain the process, give them a definition of a hypothesis (letting them know it's okay to be wrong! Through teaching, I have discovered that children learn in many different ways, and have seen the positive impact both STEM and Montessori toys have on children. One option is to incorporate the use of pH paper (which measures how basic or acidic something is when the paper is dipped into a substance) to help the child further understand why some of the solutions may work better than others. Create a solution of vinegar and salt using one teaspoon of salt and 1/4 of a cup of vinegar. Luckily, there are a number of ways to clean pennies and make them look bright and shiny again, using chemistry! Deidre is an avid writer with a Bachelor of Arts in Literature. If youre doing this with kids, this is a good time to ask them questions about the experiment. that is nice sure for kids. Put one penny in each of the liquids and make sure it's fully submerged. i thought that this was very helpful all five of my kids did this and they got an A so yea, gunna use this for my science project at school:D, well i think this experiment was welled organized but it could have showed more steps in the process of how they started from beginning to end also it could have said how long did it sit in the liquid, did they whip it off or not, showed what color was the coin at first etc, This is a great experiment im in 7th grade my science teacher was shocked.