1.
A saturated solution of H2_2S in 0.1 M HCl at 25∘^\circC contains S2−^{2-} ion concentration of 10−2310^{-23} mol L−1^{-1}. The solubility products are CuS = 10−4410^{-44}, FeS = 10−1410^{-14}, MnS = 10−1510^{-15}, CdS = 10−2510^{-25}. If 0.01 M solution of these salts in 1 M HCl are saturated with H2_2S, which of these will be precipitated?