In qualitative analysis, to identily the HA group sulphides, HCl is added to salt solution before the addition of H_(2)S. Because

In qualitative analysis, to identily the HA group sulphides, HCl is ad

1.	In qualitative analysis, to identily the HA group sulphides, HCl is added to salt solution before the addition of H_(2)S. Because
Answer» Low `S^(2-) ` ion concentration is required to get PPT HIGH `S^(2-) ` ion concentration is required to get ppt IIA group metal sulphides have higher values of `K_(sp) ` than that of IVA group metal sulphides `P^(H) ` value increases Solution :HCl ensures low CONC. Of `S^(2-) `