Question

What happens when 

(a). Dilute sulphuric acid is poured on a copper plate? 

(b). Iron nails are placed in copper sulphate solution? 

(c). Write word equations of the reactions involved.

Answer 1

(a) When dilute sulphuric acid is poured on a copper plate, there will be evolution of hydrogen gas along with the formation of blue color crystals of copper sulphate. 

CuSO₄ + H₂SO₄ → CuSO₄ + H₂ 

(b) Iron being more reactive displaces copper from copper sulphate solution. In this reaction, the blue colour of copper sulphate fades and there is deposition of copper on the iron nails. 

Fe + CuSO₄ → FeSO₄ + Cu