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What causes pennies to get dirty? | Reference.com

www.reference.com/business-finance/causes-pennies-dirty-a5f49695bbd26892

The dark brown color of a penny is most likely oxidation, which occurs when the copper in the penny comes in contact with oxygen. Since the average penny ...

Chemistry cleans pennies! - Planet Science

www.planet-science.com/categories/under-11s/chemistry-chaos/2011/03/chemistry-cleans-pennies.aspx

Pennies get dull and dirty because the copper in the pennies reacts with oxygen in the air to form copper oxide. When you put your pennies in a vinegar and salt ...

How Do Pennies Get Dirty? | eHow

www.ehow.com/facts_7344498_do-pennies-dirty_.html

Environmental Damage. A walk down any busy street reveals loose change that has fallen from pockets and purses As over half the coins produced in the ...

Copper & Kids - Copper Experiments

www.copper.org/education/Kids/copperandkids_cuexperiment.html

10 dirty pennies; 4 tablespoons lemon juice; 8 tablespoons vinegar; 1 teaspoon salt; small bowl (not metal!) 1 spoon (not metal!) paper towels or napkins ...

Why Do Pennies Turn Green? | International Precious Metals ...

www.preciousmetals.com/blog/2015/01/pennies-turn-green/

Place a dirty penny on a clean cloth and rub gently in a circular motion with the ... A 1943 Copper Wheat Penny can get more than $60,000 and one in perfect ...

www.ask.com/youtube?q=What Causes Pennies to Get Dirty&v=5hQqYLrPuAk
Apr 6, 2011 ... Watch our short video on How To Make A Dirty ... ... JUST DON'T TOUCH THE SOLUTION CAUSE YOUR HAND WILL BURN DUE TO THE ...

How does coins get dirty - Answers.com

www.answers.com/Q/How_does_coins_get_dirty

It's simple chemistry. Coins are used by people, and no matter how well you wash you still have ..... But being in captivity can cause a build up of oils and dirt on their fur. It is important they always have clean substrate (sawdust) and that you give ...

PennyCollector.com - The official website for elongated pennies ...

www.pennycollector.com/tips_clean.html

Now pour some baking soda into a small dish and add some water to make a thick ... Stir it around to dissolve the salt and then dump in your dirty pennies. ... ( The dots you see on the 'After' penny were caused by air bubbles in the lemon juice.

Project on cleaning pennies - Finishing

www.finishing.com/175/93.shtml

Oh, I have one more question, what actually causes pennies to get dirty? THANKS A BUNCH FOR YOUR HELP! Kalyn [last name deleted for privacy by Editor]

Chemical Reaction – Penny Cleaner Kids' Blog

www.indypl.org/kids/blog/?p=9577

Nov 3, 2015 ... Find More Science Experiments Everything in the universe is made of teeny ... Dirty Pennies; Taco Sauce; Vinegar; Tomato Paste; Salt; Water ...

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Science Activity: Turn Old Pennies Bright and Shiny! | Exploratorium

www.exploratorium.edu

20 dull, dirty pennies; 1/4 cup white vinegar; 1 teaspoon salt; A clear, shallow bowl (not metal); 2 clean ... How did the nail and the screw get coated with copper?

Dirty Pennies | Experiments | Triunfo

cns-eoc.colostate.edu

The pennies are dirty from being used, but there is more causing them to dull. ... But this isn't permanent, you can clean them and make them shiny again!

Tips For Cleaning Coins: How To Clean The Old, Dirty Coins In Your ...

coins.thefuntimesguide.com

Only low-grade extremely dirty coins will benefit from a good cleaning. Medium- and high-grade coins will actually go down in value if you attempt to clean ... this solution on the pennies — combined with oxygen — will cause another reaction.