Its a great way to get their young minds critically thinking, and also challenges them to solve problems using logic. Cleaning Pennies Home Experiment Conclusions Annex Analysis This graph interprets the results of the experiment. All you need are, , water, dish soap, salt, and vinegar. Vinegar (or Lemon Juice) and Salt This method is the best way to clean your pennies, and it will produce a very bright orangey-copper color on your pennies. Student Write-Up Template and Question Sheet: 5 colour pages Always happy to help! 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. This is a great activity for using just exploring and giving open-ended questioning. Start with the cups labeled 1. As an Amazon Associate I earn from qualifying purchases. Mix until the salt is dissolved (it helps if the vinegar is a little warm). You explained the science behind it perfectly. The reason for this is that copper has quite the relationship with Oxygenthat isthey react to each other. There is a second stage to this experiment that you can also try out while you are talking to your kids about their results from the first stage. To make it a true experiment, you can try to answer these . Leaving your pennies in the cleaning solution longer gives the reaction more time to continue, and gives you shinier pennies! . How did this happen? This is because when the hydrochloric solution cleaned the coin and air dried it, it also took with it some of the salt. Water from the tap is fine. And see whats the sciencebehind this phenomena. If you are looking for a fun and engaging way to keep kids passionate about learning, check out Groovy Lab in a Box. I know I was. This is because copper reacts to oxygen in the air and it turns into a compound called copper oxide. If you line up your pennies in order from the dirtiest to the cleanest, the order should go something like this: Water, Soda/Fruit Juice, Vinegar, Ketchup, and Vinegar and salt mixture. Teachers- the materials are readily available! Then, you should have more acidic solutions like ketchup and the salt and vinegar mixture. more information Accept. You may print and distribute up to 200 copies of this document annually, at no charge, for personal and classroom educational use. Place your pennies in a shallow bowl, and cover them with lemon juice. Update Includes Google Slides version for distance learning science experime Subjects: To begin, the experimenter and supervising adult should plan out which solutions they have access to and can use to test their penny-cleaning capabilities. So we proceeded to read the other ingredients and guess what we found? Place two equally tarnished pennies on each of three different plates. that is nice sure for kids. Continue to place each penny in the 5 minutes column in its corresponding cup. Have additional paper towels available to wipe off any remaining solution from the pennies. Put 1 tablespoon Ketchup into each Ketchup cup. Also, Copper oxide easily dissolves in acid. Citric acid works similarly to the other acids. 'Elephant's Toothpaste, ' link: The answer is pretty simple before 1982, pennies were made almost entirely from copper, and modern pennies are made of copper-plated zinc. I believe learning should be enjoyable and engaging. You can actually do lots of simple science experiments at home with just a few basic supplies. Make sure your child doesn't lick the pennies or try to eat any because ketchup is tasty. In this case, you may have noticed that the Ketchup and Tabasco pennies were not quiet as well-cleaned as the pennies that were in the vinegar and lemon juice. Its exactly the same reaction thats happening to the dearly beloved Statue of Liberty! 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. Using the tape and marker, label each dish or cup with the name of the solution that will go into it. Ketchup also contains a lot of salt, which helps add to its acidity. Phosphoric acid breaks down the copper oxygen compound and causes a new layer of the copper to be exposed. While the coins are submerged in the cups, lay out some paper towels or kitchen paper and label each towel so you know which coin is going where. Water is the worst because it is a neutral liquid, meaning that it sits smack in the middle of the pH scale. And don't worry, I give the science behind it all! Posted on Last updated: July 4, 2021 By: Author Kim. It utilizes a lot of stuff you already have lying around your house, and does not require you to go out and buy a lot of fancy science gadgets. 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. Dish soap. In the first cup, put plain water. (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. I'm a mom of three and STEM enthusiast. Here are the scientific method steps and some sample questions to help you work through it. This spectacular 5-IN-1 BUNDLE: (Presidents' Day) Children often think the soapy water will work best as it is normally used for cleaning, but children who understand what acids are or who know a little about chemistry may have a better idea about what will work. All you need are pennies, water, dish soap, salt, and vinegar. 'Elephant's Toothpaste, - Lesson 4 of 50 - Grades 4,5,6 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. The statue ismade of copper and it has turned bluish-green because of this copper-oxygen-chlorine reaction. Copper oxide dissolves in a mixture of weak acid and table salt. 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. The Salt And Vinegar Method. Label this column "Cleaning Method." The next column, label "1 Minute." And label the third column "5 Minutes." Make each cell (square) of the table large enough to place your penny in it after. Did you get to the same conclusion that the ketchup and the vinegar + salt mixture cleaned the coins the most? When printing this document, you may NOT modify it in any way. If you have dirty, dull, or green pennies lying around, try the cleaning pennies science experiment to turn them bright again! They each include Question, Hypothesis, #1-How many drops of water can you fit on a, #2-Which liquid can you fit the most drops of on, to hook those kiddos and get them writing up a lab report! 10 very dirty pennies (the dirtier the better! Put 1 tablespoon Tabasco into each Tabasco cup. 'Fire Water Balloon, ' link: 'Balloon Powered Rocket, ' link: None of our pennies were dull anymore, and some were downright shiny! Lesson contains Whether you've got toddlers or grandparents to entertain, family nights are the p, Antique Christmas Houses for a Victorian Village Display, From sitting on brick firework mantles to placed underneath genuine fir Christmas trees, people have been displaying their ceramic or plastic holiday town scenes for decades. Great for President's Day! 5. This product is designed to teach people how to clean old, tarnished pennies using simple household items such as vinegar and salt. Add the salt, and stir until the salt is completely dissolved. I have included 4 recording sheets to go along. We use cookies and those of third party providers to deliver the best possible web experience and to compile statistics. Take the dirty copper pennies (the ones from the bottom of your purse are best) and have your child place one into each cup. Here is a step by step walkthrough of the experiment so you dont get forget what to do or lose track of where you are: Once this is all done, you may be tempted to clean everything but not yet! This is what the pennies look like sitting at the bottom of the glass. Rocking Chair, Glider, or Recliner for the Nursery: Is It Worth It? Remove the pennies and rinse them with water. You should have at least five different liquids ready to pour into each individual cup, but you can always add some more for fun. Let the pennies soak for a little bit. So, the acetic acid in vinegar dissolves the copper oxide and cleans it. Check it out. Copyright 2002-2023 Science Buddies. But if you really want to dig in you can guide your children through the scientific method while doing this. But we think that that alone could not clean coins this quickly. 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 2 of 50 - Grades 4,5,6 Place the pennies in the bowl, and allow them to sit for several minutes. Science: Project Cleaning Pennies Question: What products clean pennies the best? The pennies have become tarnished as the copper coating reacts with oxygen in the air and forms a copper oxygen compound, which makes the pennies appear brown. So if you want to try this simple science experiment out at home, here is what you need to do: The first step you will have to do is to make your hypothesis. 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. Will using lemon juice and salt have better results than vinegar? Why is that? Read this: Life Lessons from the Scientific Method.). You have students write a hypothesis for what they think will happen in each solution and then let them soak. of salt and a bowl, preferably metal. Update Includes Google Slides version for distance learning, Rated 4.77 out of 5, based on 172 reviews, " is a product that provides a fun and educational activity for children and adults alike. Place each of the pennies in the 1 minute column into their corresponding cup. If you have older kids, you can let them pour the soda. from Science Buddies http://www.sciencebuddies.org/science-activities. 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. And it even had added acetic acid! All with pocket change actually. To begin with, you'll want to find a handful of dirty pennies. All rights reserved. A questionable aspect of this experiment is arisen with the change of the color of ammonia during the experiment. Its acid! 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. Most of the liquids (except the water) should have somewhat cleaned the coin. Hot SauceHot sauce, like Tabasco or taco sauce, also will remove the oxides off pennies. All rights reserved. Pop another coin in both the ketchup and vinegar and salt mixture. 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).
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