Nitric acid reacts with copper in different concentration
(i) With dilute HNO3
Copper reacts with dilute nitric acid produces cupricnitrate and nitrous oxide gas.
(ii) With 50% nitric acid
Copper reacts with 50% nitric acid forms cupric nitrate and nitric oxide gas.
(iii) With conc. HNO3
Copper reacts with conc. HNO3 produces cupric nitrate and NO2 gas.
2HNO3 →H2O + 2NO2 + [O]
