Question

In the confirmatory test of sulphate radical with barium chloride solution, Conc.HCl should not be added. Why?

Answer 1

Answer:

Here the salt solution E is Na

2

SO

4

. When BaCl

2

solution is added to Na

2

SO

4

, white precipitates of BaSO

4

are formed.

This white precipitate formed are insoluble in dil. HCl. This test is used for the identification of sulphate (SO

4

2−

) radical.