Problem: A solution contains 2.0 x 10-4 M Ag+ and 1.5 x 10-3 M Pb2+.If NaI is added, will AgI (Ksp = 8.3 x 10-17) or PbI2 (Ksp = 7.9 x10-9) precipitate first? Specify the concentration of I- needed to begin precipitation.

FREE Expert Solution

AgI (s) → Ag+ (aq) + I- (aq)

Ksp = [Ag+][I-][I-] =[Ag+]Ksp [I-] =2.0×10-48.3×10-17

[I-] = 2.41x1012


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Problem Details

A solution contains 2.0 x 10-4 M Ag+ and 1.5 x 10-3 M Pb2+.If NaI is added, will AgI (Ksp = 8.3 x 10-17) or PbI2 (Ksp = 7.9 x10-9) precipitate first? Specify the concentration of Ineeded to begin precipitation.

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