Which metal sulfides can be precipitated from a solution that is 0.01 M in Mn²⁺,Zn²⁺,Pb²⁺ and Cu²⁺ and 0.10 M in H₂S at a pH of 1.0? A)MnS B)CuS C)PbS,CuS D)ZnS,PbS,CuS

Question

Quizplus · Accepted Answer

At a pH of 1.0, the solution contains a high concentration of H+ ions which can react with the HS- ions to form H2S gas. This means that the concentration of sulfide ions (S2-) in the solution is decreased, which can affect the precipitation of metal sulfides. However, all four metal ions (Mn2+, Zn2+, Pb2+, Cu2+) have low solubility product constants with sulfide ions, which means that they are likely to precipitate even at low sulfide concentrations. Therefore, all four metal sulfides (MnS, ZnS, PbS, and CuS) are possible to precipitate from this solution.

Which Metal Sulfides Can Be Precipitated from a Solution That