Question

Give an example of a precipitation reaction and also express the reaction that occurs in the form of a balanced chemical equation.

Answer 1

\[\ce{Na2SO4_{(aq)} + BaCl2_{(aq)} -> \underset{(White ppt)}{BaSO4_{(s)}}\downarrow + 2NaCl_{(aq)}}\]

A white precipitate of barium sulphate is created when an aqueous solution of sodium sulphate and barium chloride is combined because the reaction experiences double displacement.