Can Coca Cola erode a penny?

Answer 1

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.

Answer 2

Yes it can cause of the acid in it, it also can remove rust from your bumper, pour on the rust spot and then use tin foil to rub it in. Then again, plain carbonated water will do the same.

Answer 3

The penny in a few minutes will be clean an shiny. If you leave the penny to long it starts to eat the metal. Can you imagine what it can do to your teeth and stomach then!

Answer 4

the coke will make the penny go shiny because of the phosphoric acid that is in the coke will eat the oxide coat on the penny that has build up in time

Answer 5

It reduces the amount of rubbish on the surface of the penny making it easier to read, and less revolting at sight.