Write the reaction equation: Cu – CuO – CuCl2 – Cu (OH) 2 – CuO – Cu (NO3) 2 – CuO – Cu

1.2Cu + O2 = 2CuO.
Combustion of copper in excess of oxygen, t = 400 – 500 ° C.
2. CuO + 2HCl = CuCl2 + H2O.
Reaction of copper oxide with hydrochloric acid.
3. CuCl2 + 2NaOH = Cu (OH) 2 + 2NaCl.
Formation of hydroxide in reaction with alkali.
4. Cu (OH) 2 = CuO + H2O.
The decomposition of copper.
5.CuO + 2HNO3 = Cu (NO3) 2 + H2O.
Reacts with nitric acid to form copper nitrate.
6.2Cu (NO3) 2 = 2CuO + 4NO2 + O2.
Decomposition reaction, t = 180 ° C.
7. CuO + H2 = Cu + H2O.
Reduction of copper in reaction with hydrogen, t = 150 – 250 ° C.