How do metals react under acids?

Question

i'm doing an experiment and i need help. how long would i let the metals and acids have contact with each other before i record the rusting and the deterioration of the metals?

Answer 1

Some acids react with some metals and not all acids react with all metals. It all depends on what is reacting with what. However, assuming there is a reaction, the acid will dissolve the metal to produce the metal salt of that acid; at the same time it will produce hydrogen gas. ie 2H+ + M = 2M+ + H2

However, there are some exceptions; if you mix conc nitric acid with copper, you will get clouds of brown nitrogen dioxide gas.

Answer 2

Metals don't rust when exposed to acids. Metals rust when exposed to oxygen.

(Chemistry Teacher)