In qualitative analysis, to identify the IIA group sulphides, HCl is added to salt solution before the additions of H_2S . Because

In qualitative analysis, to identify the IIA group sulphides, HCl is a

1.	In qualitative analysis, to identify the IIA group sulphides, HCl is added to salt solution before the additions of H_2S . 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-) `