[RogerAsdf]

Hi. Why will iron + water become rusty but copper + water will become verdigris?

[Arkcon]

Can you try to thick about the question chemically?  What are the likely reactions, and likely products, in each case?

[RogerAsdf]

I'm about to do an experiment by putting down a piece of coppar and a piece of iron in different glases. Explained beneath:

Glas #1: A piece of iron + regular water.
Glas #2: A piece of coppar + regular water.

Glas #3: A piece of iron + water with 3% NaCl (weight percent).
Glas #4: A piece of coppar + water with 3% NaCl (weight percent).

So basically I want to find out the reason on what makes the iron becoming rusty and what makes the coppar turn verdigras. Also, while I mentioned it, if I put some salt into the water with the piece of iron or coppar, will that change the reaction?

I thank you the kindest in advance.

Edit: also, would something happen if I poured some vinegar into the water (with or without NaCl)?

[fledarmus]

What is the chemical structure of rust?

What is the chemical structure of verdigris?