Will precipitate CdCO3, if up to 2 liters. 0.05M K2[Cd(CN)4] solution containing 0.06M KCN excess, add 1 liter. 0.03 M K2CO3 solution? K([Cd(CN)4]2-] = 7.66*10^-18; Ksp(CdCO3) = 2.50*10^-14