What is the molar solubility of nickel(II) sulfide in 0.091 M KCN? For NiS,Ksp = 3.0 × 10-19; for Ni(CN) 42-,Kf = 1.0 × 1031.
A) 5.5 × 10-10 M
B) 9.1 × 10-2 M
C) 1.5 × 10-19 M
D) 2.3 × 10-2 M
E) 2.9 × 10-5 M
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