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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 ...

Dirty Pennies | Experiments | Triunfo

cns-eoc.colostate.edu/triunfo/experiments/dirty_penny.html

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!

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!) ... The copper oxide makes the pennies look dirty.

How Do Pennies Get Dirty? | eHow

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

Dirty pennies have a variety of causes. penny graph image by RT from Fotolia. com. There are currently over 130 billion pennies circulating in the United States.

HOW DOES ACID AFFECT DIRTY PENNIES? - Finishing

www.finishing.com/81/59.shtml

WHAT DOES THE ACID DO WHEN IT CLEANS THE PENNY? BECAUSE I ... The copper oxide makes the pennies look dirty, but they are really not. When the ...

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

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

If the eraser is too hard, it can leave deep scratches in the penny. Place a dirty penny on a clean cloth and rub gently in a circular motion with the eraser. Flip the  ...

5 Ways to Clean Pennies - Methods and Instructions

coins.about.com/od/Start-Collecting-Coins/a/5-Ways-To-Clean-Your-Pennies.htm

... of all ages can enjoy. Here are five ways to make your pennies bright and shiny again. ... First, lay your dirty penny on top of a piece of paper or clean cloth.

Chemical Reaction – Penny Cleaner Kids' Blog

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

Nov 3, 2015 ... A chemical reaction takes place that makes a molecule called copper oxide – that is the dirty stuff that you see on the penny. This “stuff” is often ...

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

coins.thefuntimesguide.com/2008/01/how_to_clean_coins.php

The penny looks weird now huh? A dull pinkish color… Now make a concoction out of baking soda and a little water to form a paste. Rub this compound all over ...

www.ask.com/youtube?q=What Makes Pennies Dirty?&v=5hQqYLrPuAk
Apr 6, 2011 ... This instructional video is a suitable time-saver that will enable you to get good at science cool experiments. Watch our short video on How To ...
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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 ... Copper atoms can combine with oxygen atoms from the air to make a  ...

Chemistry cleans pennies! - Planet Science

www.planet-science.com

Dirty pennies; White vinegar; Table salt; Shallow glass or plastic bowl. How to: Put a couple of ... It's the same reaction that makes the Statue of Liberty green!

CLEAN PENNIES WITH VINEGAR - ScienceBob.com

sciencebob.com

Put about 5 pennies into the bowl and count to 10 slowly. Take out the ... Do other amounts of salt make a difference in the chemistry of the experiment? Science ...