Question

State what would you observe when: Copper carbonate is heated.

Answer 1

Solution:

• Reactant: Copper carbonate (CuCO₃)- Green colored solid
• Chemical reaction: When copper carbonate (green solid) is heated, it decomposes to produce solid copper (II) oxide (CuO), and carbon dioxide (CO₂).
• Thus, the reaction is a decomposition reaction.
• The balanced chemical equation for the reaction is:
• ${\mathrm{CuCO}}_3\left(\mathrm{s}\right)\stackrel{∆}{\to }\mathrm{CuO}\left(\mathrm{s}\right)+{\mathrm{CO}}_2\left(\mathrm{g}\right)$

Observation: copper carbonate is a green solid and product CuO is a black solid. Hence, green color disappears, and black color appears.