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) + S2-(aq) ; Kc = 1.1 × 10-20
Salt
Ksp
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
Correct Answer:
Verified
Correct Answer:
Verified
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