Question

On adding excess of CaCl₂ to a solution containing Na₂CO₃
and NaHCO₃, x g of precipitate was obtained. On adding in
drops to the filtrate, a further y g of precipitate was obtained.
In another experiment to the same amount of solution excess
of CaCl₂ was added, boiled and filtered. The amount of the
precipitate in the second experiment would be
(a) x + y (b) x + y/2
(c) x + y/2
(d) none of these

Answer 1

On adding excess of CaCl₂ to a solution containing Na₂CO₃ and NaHCO₃ , x gram of precipitate was obtained.On adding a drop into the filtrate,a further y g of precipitate was obtained.

in another experiment to the same amount of solution ,excess of CaCl₂ was added,boiled and filtered. The amount of the precipitate in this experiment would be (b) x+y/2