Question

While studying the double displacement reaction, the solutions of barium chloride and sodium sulphate are mixed together.
(i) What do you observe as soon as the two solutions are mixed together ?
(ii) What will happen in the above observation made by you after ten minutes ?

Answer 1

(i) A white precipitate of barium sulphate is immediately formed.
`BaCl_(2)(aq)+Na_(2)SO_(4)(aq)rarrunderset("white ppt.")(BaSO_(4)(s))+2NaCl(aq)`
(ii) The white precipitate will settle down at the bottom of the tube and the solution above the precipitate will become colourless.