Question

How would you test for so4 2- in an aqueous solution?

Answer 1

The test for
`SO^(2-)_4` ion :

Procedure :

1) In a test tube, add 5-10 drops of aqueous solution of
`SO^(2-)_4`.

2) Add 1-2 ml of HCl solution and Barium chloride solution in the test tube.

The formation of white precipitate indicates the presence of
`SO^(2-)_4` ion.

The chemical reaction is,

`BaCl_2(aq)+SO^(2-)_4(aq)\rightarrow BaSO_4(aq)`

The White precipitate of
`BaSo_4` formed in this reaction.