In the second group of qualitative analysis, H_(2)S is pass through a solution acidified with HCl in order to :

In the second group of qualitative analysis, H_(2)S is pass through a

1.	In the second group of qualitative analysis, H_(2)S is pass through a solution acidified with HCl in order to :
Answer» LIMIT the concentration of `S^(2-)` ions increase the solubility of `H_(2)S` increase the concentration of `S^(2-)` ions provide EXTRA `Cl^(-)` ions Solution :HCl suppresses the concentration of `S^(2-)` ions in solution due to common ion EFFECT. `H_(2)S overset((AQ))hArr 2H^(+) (aq) + S^(2-) (aq)` `HCl overset((aq))rarr H^(+) (aq) + Cl^(-) (aq)`