(a) What happens when a piece of iron metal is placed in copper sulphate solution? Name the type of reaction involved.
(b) Write balanced chemical equation with state symbols for the following reaction:
Barium chloride solution reacts with sodium sulphate solution to give insoluble barium sulphate and a solution of sodium chloride.
(a) What happens when a piece of iron metal is placed in copper sulphate solution? Name the type of reaction involved.
(b) Write balanced chemical equation with state symbols for the following reaction:
Barium chloride solution reacts with sodium sulphate solution to give insoluble barium sulphate and a solution of sodium chloride.

(a) Magnesium sulphate solution and copper metal are produced when a piece of iron metal is immersed in a copper sulphate solution. This is an example of a displacement reaction.

CuSO4 + Fe → FeSO4 + Cu

(b) Na2SO4 + BaCl2 → BaSO4 + 2NaCl