Question

when sodium sulphate solution reacts with barium chloride solution​

Answer 1

Na2SO4 + BaCl2 → 2 NaCl + BaSO4.

This is a best example for double displacement reaction.

Answer 2

Hey mate ☺

BaCl2 (aq) + Na2SO4 (aq) --> 2 NaCl (aq) + BaSO4 (s)

Barium sulphate is insoluble in water, so it will precipitate as a solid.

Sodium chloride will remain in solution.

Hope it helps you ☺✌✌