What is the molar solubility of PbI2 in 0.10 M KI? Does the presence of KI increase or decrease the solubility...

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What is the molar solubility of PbI2 in 0.10 M KI? Does the presence of KI increase or decrease the solubility...

What is the molar solubility of PbI_{2 in 0.10 M KI? Does the
presence of KI increase or decrease the solubility of PbI2? You
must use the ICE method.}

science chemistry

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Answer 1

Answer #1

The dissociation of Pbl is as follows: K of Pbl-7.1x10 The expression for the Kp of the reaction is as follows: Construct an ICEtable for the reaction Initial Change: Equilibrium: Substitute these values in the expression as follows 0 0.1 7.1x109x) (0.1+2x) Solve for x

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Answer 2

Answer #2

The equilibrium is

PbI2 (s) <=> Pb2+ (aq) + 2 I- (aq)

Ksp=[Pb2+][I-]

=4x^3

but due to presence of KI I- is already present.

hence I-=x+0.1 (as KI is strong electrolyte.)

ksp=8.49*10^-9=x*2(x+0.1)^2

8.49*10^-9=2x*0.01

molar solubility=8.49*10^-7

KI decreased the solubility of PbI2

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Answer 3

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