question_answer 71)

  On adding a drop of barium chloride solution to an aqueous solution of sodium sulphite, white precipitate is obtained. (a) Write a balanced chemical equation of the reaction involved. (b) What other name can be given to this precipitation reaction? (c) On adding dilute hydrochloric acid to the reaction mixture, white precipitate disappears. Why?

Answer:

  (a) (b) Double displacement reaction (c) As the reaction product barium chloride is water soluble, the white precipitate disappears.