The sulphide ion concentration [S^(2-)] in saturated H_(2)S solution is 1 xx 10^(-22). Which of the following sulphides should be quantitatively precipitated by H_(2)S in the presence of dil. HCl {:("Sulphide",,"Solubility Product"),("(I)",,1.4xx10^(-16)),("(II)",,1.2xx10^(-22)),("(III)",,8.2xx10^(-46)),("(IV)",,5.0xx10^(-34)):}

The sulphide ion concentration [S^(2-)] in saturated H_(2)S solution i

1.	The sulphide ion concentration [S^(2-)] in saturated H_(2)S solution is 1 xx 10^(-22). Which of the following sulphides should be quantitatively precipitated by H_(2)S in the presence of dil. HCl {:("Sulphide",,"Solubility Product"),("(I)",,1.4xx10^(-16)),("(II)",,1.2xx10^(-22)),("(III)",,8.2xx10^(-46)),("(IV)",,5.0xx10^(-34)):}
Answer» I, II III, IV II, III, IV Only I Solution :Basic radicals of group II & IV are precipitated by `H_(2)S` in the form of their SULPHIDES. Iind group in acidic medium & IV group in ALKALINE medium. They precipitate when IONIC product increases than solubility product.