Question

what get when we react hot copper with HNO3

Answer 1

4HNO3 + Cu ===> Cu(NO3)2 + 2No2 + 2H2O

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 deep blue color. The nitrogen dioxide is a orange vapor.