Question

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

Answer 1

Answer :

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.