After all the copper oxide is gone, use a strainer to drain the juice. However, don't throw away your juice in case some still need it. Rinse with cool water. If any pennies still have oxidation, put them back in the juice. How to Test Since it's always more fun to find out firsthand than to read an article, why not conduct an experiment?
Once the materials are ready, follow these steps: Pour each juice into a mason jar and label it with tape. Dip a piece of pH paper into each jar. The bluer it turns, the more alkaline the juice. The redder it turns, the more acidic. Set the papers aside to dry and label each. Drop two pennies into each jar and seal it tightly. Let the pennies sit in their respective juices overnight.
Refrigerating the jars is optional. Check the results the next day and compare them to each juice's pH. Rank the appearance of each penny from one to five and see how it corresponds to acidity. Cleaning Pennies While this experiment is a good way to teach kids about chemistry, it is not a good way to clean pennies that are collector's items. Penny Cleaning Science Project. By Mary Gormandy White. By Kathleen Esposito.
By Jennifer L. Where to Buy Citric Acid. They will even go so far as to tell you not to handle them except by holding them along their edges, and even then, with extreme care. Polishing or rubbing coins can cause unnatural shine or other damage, also reducing the value of your coins.
Chuck your coins in a tupperware or some sealable plastic container with enough vinegar to cover it, give it a good vigorous shake every now and again and I reckon after about mins your coins should be clean ish.
To keep copper from tarnishing, you need to eliminate the circumstances which make it tarnish. Additionally, you can coat your copper object by wiping it with a light coat of baby oil, mineral oil, olive oil, WD, or even a thin layer of carnauba wax or beeswax. Fill a pot with water, then add a cup of white vinegar and a tablespoon of salt. Mix thoroughly until the salt is dissolved. The mixture of vinegar and salt produces a mild acid that can dissolve copper oxide.
Begin typing your search term above and press enter to search. Press ESC to cancel. Skip to content Home Research Paper What cleans a penny the best science project?
Research Paper. Ben Davis June 1, What cleans a penny the best science project? What kind of juice cleans pennies best hypothesis? As we have seen experimentally, acid alone does not clean as well as acid and salt. It appears, the salt breaks down somewhat, freeing chlorine ions into the solution. 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. Follow us on Facebook , Twitter or Instagram to see new experiments!
Educators Parents Organizations Registration Blog. Cleaning Pennies This is a simple observation experiment you can do on your own. No adults needed! Did this summary help you? Yes No. Log in Social login does not work in incognito and private browsers. Please log in with your username or email to continue. No account yet? Create an account. Edit this Article. We use cookies to make wikiHow great.
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Method 1. All rights reserved. This image may not be used by other entities without the express written consent of wikiHow, Inc. Put enough ketchup in the cup to cover up the coin or coins. For the record, with this method, you may be able to smell the ketchup on the penny when you are finished. Tabasco, on the other hand, may leave an orange tint. However, they will be clean!
Put the coin in and wait three minutes. If you have a toothbrush handy preferably your roommate's , after the three minutes are up, scrub the penny, working into the little ridges. Wash the coin off in hot water. And if you used your roommate's toothbrush, wash that off, too!
If the pennies are clean, but not shiny, mix a paste of baking soda and water and rub into the pennies. Wash it off and tada! Method 2. Stir the mixture to dissolve the salt. If you don't have vinegar, use lemon or even orange juice. Copper oxide the gunk on your pennies dissolves in weak acid, and that's just what all three of these liquids are. Place your pennies in the vinegar or the lemon juice. Make sure they are not directly on top of each other. Leave the pennies for around five minutes in the glass of vinegar or lemon juice.
If they're extra dirty or if you're cleaning a lot simultaneously, give them a few more minutes for good measure. Take the pennies out, and wash them off. Let them dry for around five minutes so they will no longer be wet.
They will now sparkle.
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