Question

Give one example of a displacement reaction.

Answer 1

Example Displacement reaction:

1. When a grey colour iron nail is dipped in blue colour copper sulphate solution, a brown coating of copper is formed on the surface of the iron and the colour of the copper sulphate solution changes from blue to pale green.
2. This reaction shows that iron is more reactive than copper because it displaces copper from the copper sulphate solution.

CuSO₄ (aq) + Fe (s) → FeSO₄ (aq) + Cu (s)

Copper sulphate Iron Iron Sulphate Copper

(Blue) (Grey) (Green) (Brown)