Suppose Hydrogen Sulfide Is Added to a Solution That Is

question 74

Multiple Choice

Suppose hydrogen sulfide is added to a solution that is 0.10 M in Cu²⁺,Pb²⁺,and Ni²⁺ such that the concentration of H₂S is 0.10 M.When the pH of the solution is adjusted to 1.00,a precipitate forms.What is the composition of the precipitate?
H₂S(aq) + 2H₂O(l)
2H₃O⁺(aq) + S^2-(aq) ; K_c = 1.1 × 10^-20
Salt
K_sp
CuS
6) 0 × 10^-36
PbS
2) 5 × 10^-27
NiS
3) 0 × 10^-19

• A)CuS only
• B)PbS and NiS
• C)CuS and PbS
• D)NiS only
• E)CuS,PbS,and NiS

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