Is passed through the solution in an acidic medium to precipitate the sulphides of…
CHEMISTRY · Single correct · AP · Chemistry · Equilibrium · Equilibrium
Problem
H2S is passed through the solution in an acidic medium to precipitate the sulphides of group II cations, but in an alkaline medium to precipitate the sulphides of group IV cations because:
(1) the sulphides of group II cations are more soluble than those of group IV cations
(2) the sulphides of group II cations have lower solubility products than those of group IV cations
(3) the sulphides of group II cations are soluble in an acidic medium, but those of group IV cations are not
(4) the sulphides of group IV cations are soluble in an alkaline medium but those of group II cations are not