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 ...
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
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.
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 ...
Basically, the experimenter tries to find out which solution will clean pennies best,
... Luckily, it's also the older pennies that are more likely to be dirty. ... to nothing
to improve a penny's appearance, taco sauce can cause a vast improvement.
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 ...
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.
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
Now pour some baking soda into a small dish and add some water to make a
thick paste. ... Stir it around to dissolve the salt and then dump in your dirty
pennies. .... regular pliers else the penny might become a projectile and cause
Yes, the tarnish is copper oxide. But actually the tarnish is not from when the
pennies are made (brand new pennies are shiny); the tarnish is from the copper