Question

11. Give your observations and reactions for the following.
(a) When copper carbonate is heated.
(b) When zinc strip is added to hydrochloric acid.
(C) When iron rod is immersed in copper sulphate solution.

Answer 1

Answer:

(a) CuCO3 → CuO + CO2

(b) Zn + 2 HCl → ZnCl2 + H2  

(c) Fe + CuSO4 → FeSO4 + Cu

Explanation:

(a) Carbone dioxide is released, Copper oxide left.

(b) Zinc develop hydrogen in a mineral acid.  

(c) Iron replace copper because it is more reactif.