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 concentration of HS- ions is high enough to precipitate metal sulfides that have lower solubility products. The solubility products in decreasing order are: CuS < ZnS < PbS < MnS. Therefore, CuS, ZnS, PbS, and MnS can all potentially be precipitated. Thus, the best choice is D, which includes all four options.

Which Metal Sulfides Can Be Precipitated from a Solution That