Question

In reaction of barium chloride and sodium sulphate,the exchange of which ions take place?

Answer 1

The reaction between barium chloride and sodium sulfate can be shown as follow:

BaCl₂ + Na₂SO₄ → BaSO₄ + 2NaCl

This reaction is double displacement reaction.

General double displacement reaction is :

AB + CD → AD + BC

In BaCl₂, A is Ba²⁺, and B is Cl^−. In Na₂SO₄, C is Na⁺, and D is SO₄^2−. The products from the reaction of BaCl₂(aq) and Na₂SO₄(aq) are BaSO₄ and NaCl. So the ions which are exchanged between reactants are Cl^− and SO₄^2−.