Question

wite the chemical equation for the reaction of copper metal with conc. hno3

Answer 1

The nitric acid formed by the action of hot,conc.H2SO4 on the nitrate saltreacts with metallic copper to give copious fumes of reddish brown nitrogen dioxide.

Answer 2

Nitric acid reacts with copper according to the reaction: 4 HNO3(l) + Cu(s) ==> Cu(NO3)2(s and aq) + 2 NO2(g) + 2 H2O(l) The copper nitrate salt that forms is a deepblue color. The nitrogen dioxide is a maroon vapor.