Soda pop is a mild acid, because of dissolved carbon dioxide. Acid dissolves the copper oxide tarnish that darkens the penny's color.
Vinegar, yes, but not ketchup. Vinegar cleans it because it is an acid. Actually, the best thing to use is cola or lemonade and leave the penny in some cola or lemonade for 48 hours - it normally does the trick!
I would say 7up or Sprite since they are more acidic Coca-Cola takes rust of a bumper. Coke is more acidic than 7-up or Sprite. Coca-Cola is my result. Schweppes Ginger Ale cleans a penny the best .
A copper penny builds up a layer of corrosion on its outsides. Probably copper oxide. The cleaning just dissolves the outer corrosion and leaves a new outer layer of copper. CuO + HNO3 --> Cu(NO3)2 + H2O ... the copper nitrate is dissolved in the acid solution and leaves 'clean' copper behind.
Copper
The acidity in Tapatio hot sauce, mainly from vinegar, can help to dissolve the tarnish on a penny. Vinegar is a mild acid that can react with the copper oxide on the penny's surface, making it shine again.
You should just soak a PENNY in CoCA CoLA.
coca cola
i did a science project on it and all it did to the penny was stain it but i dont know because i just let it sit in the coca cola but maybe if you scrubed it with something maybe be but i tested it and it just stained it
Sugar reaches the copper and they form a physical change
its an acid to prove it put a penny in a cup of cola and it will come out clean x by lauren.conway
Vinegar contains Acetic acid that reacts with the copper in the penny.
Vinegar, yes, but not ketchup. Vinegar cleans it because it is an acid. Actually, the best thing to use is cola or lemonade and leave the penny in some cola or lemonade for 48 hours - it normally does the trick!
It is thought that the acid in Coke can clean some types of metal. Like copper.
It's main use is as a drink, however I use it to clean copper things.
Coca-Cola leaves the penny bright and shiny. Coke does this by corroding the copper oxide layer that forms naturally through exposure to the air over the penny's copper plating. While the oxide layer is stable and prevents further reaction of the copper plating, it obscures the shiny copper plating to give the penny a darker, dull appearance. Coke is able to remove the oxide layer on pennies because of its acidity (Coke has a pH of approximately 2.5, similar to lemon juice). Acidity gives it corrosive properties. To be more specific (and a tad uncertain), the phosphoric acid in Coca-Cola likely reacts with the copper oxide layer to remove it.
A mixture of vinegar and salt or lemon juice and salt can effectively clean a penny by removing oxidation and dirt. These acids help dissolve the tarnish and reveal the shiny copper surface of the penny.
Well without it, you wouldn't be able to clean a penny would you? You have to think about these things logically man... c'mon...