Write the reaction equation: Cu – CuO – CuCL2 – Cu (OH) – CuSO4

1) 2Cu + O2 = 2CuO (when copper interacts with oxygen, copper oxide is formed);

2) CuO + 2HCl = CuCl2 + H2O (when copper oxide interacts with hydrochloric acid, copper chloride and water are formed);

3) CuCl2 + 2NaOH = Cu (OH) 2 + 2NaCl (when copper chloride interacts with sodium hydroxide, copper hydroxide and sodium chloride are formed);

4) Cu (OH) 2 + H2SO4 = CuSO4 + 2H2O (when copper hydroxide interacts with sulfuric acid, copper sulfate and water are formed).