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Acids typically clean a penny best because they can dissolve the tarnish (copper oxide) effectively. Bases, on the other hand, may not be as effective in cleaning pennies due to their different chemical reactions with copper oxide.
Baking soda reacts with the copper surface of the pennies, causing them to form a blue/greenish copper oxide layer. This chemical reaction changes the surface of the pennies, giving them a blue appearance.
When copper clad pennies are combined with zinc chloride, a chemical reaction occurs that removes the copper coating from the pennies, leaving behind a shiny zinc surface. This reaction is often used in chemistry classrooms to demonstrate chemical changes.
its is good for cleaning with
vinegar
The lemon juice and salt cause a chemical reaction that eats away at the corosion on the penny causing it to shine. It is basic chemistry just like almost all of the living body functions like burping are caused by chemical reactions. Those chemical reactions have to include water to make the bodily chemical reactions work.
lemon juice
There are many items that clean pennies, but when coming to juices that clean pennies, Lemon and Vinegar can be a good choice. Though they aren't cleaning agents the way soaps and detergents are, they can be excellent at cleaning pennies. When you mix them with little salt, they start turning into a gentle acid mixture ideal for taking out stain on pennies. Just place the mixture on a disposable container and soak and wash the pennies in it.
they are from copper and copper is from the world
NO, cleaning them will probably reduce their value
yes, lemon or a salt+vinegar solution would actually 'clean' the pennies by making them brighter/ shinier. They are both also mild disinfectants of sorts, so they would be cleaning them as well. hope this answer is what you needed! :D
Chemistry