Question

Give an example of a double displacement reaction.

Answer 1

The reaction in which there is an exchange of ions between the reactant takes place is called double displacement reaction.

For example: 

Na₂SO₄ + BaCl₂→ BaSO₄ + 2NaCl 

Sodium Barium Barium Sodium sulphate chloride sulphate chloride In the above reaction, the exchange of ions (SO₄^2- and Ba²⁺) takes place. The white precipitate of BaSO₄ is formed by the reaction of SO₄^2- and Ba²⁺. The other product formed NaCl remains in the solution.