Write the reaction equation: CuCO3 – CuO – Cu – CuCl2 – Cu (OH) 2 – CuO

We compose the reaction equations:
1. CuCO3 = CuO + CO2 – decomposition reaction occurs when heated;
2. CuO + H2 = Cu + H2O – redox reaction;
3. Cu + Ci2 = CuCl2 – compound reaction, occurs when heated;
4. CuCl2 + 2NaOH = Cu (OH) 2 + 2NaCl – ion exchange, copper hydroxide is formed in the sediment;
5. Cu (OH) 2 = CuO + H2O – decomposition reaction, copper oxide is formed.
The chain of transformations confirms the connection of inorganic substances: salts, oxides of simple metal substances, bases.