Though zinc and manganese get precipitated as their sulphides, they do not get precipitated along with lead or copper when H_(2)S is passed through acidified solution of their salts. Justify and also explain how the precipitation of Zn^(+2) and Mz^(+2) ions takes place

Though zinc and manganese get precipitated as their sulphides, they do

1.	Though zinc and manganese get precipitated as their sulphides, they do not get precipitated along with lead or copper when H_(2)S is passed through acidified solution of their salts. Justify and also explain how the precipitation of Zn^(+2) and Mz^(+2) ions takes place
Answer» Solution :(i) requisite for PRECIPITATION of the respective sulphides (ii) difference in the TYPES of IONS present in an acidified salt solution and normal salt solution (iii) ions present in the solution when `H_(2)S` is passed through it (iv) influence of EXTRA ions present in the acidified solution on the degree of dissociation of `H_(2)S` (v) relation between the degree of dissociation of `H_(2)S` and the availability of sulphide ions in the solution (vi) relation between the number of sulphide ions and the precipitation of the selective salts