Question

The reaction of nitric acid with metals depends upon the concentration of the acid. Give examples, along with equations to illustrate the reaction of the add. 

Answer 1

Copper reads differently with nitric add at different concentrations and temperature.

(i) Copper reacts with cold and dilute nitric add to form copper nitrate, water and nitric oxide gas is liberated.

(ii) Copper reacts with hot and concentrated nitric acid to form copper nitrate, water and nitrogen dioxide.gas, which has reddish brown fumes and a pungent smell is liberated.