What is the molar concentration of I– in 1 liter of a saturated water solution of PbI2 if the Ksp of lead iodi
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What is the molar concentration of I– in 1 liter of a saturated water solution of PbI2 if the Ksp of lead iodi

[From: ] [author: ] [Date: 11-05-07] [Hit: ]
...[Pb 2+].........
What is the molar concentration of I– in 1 liter of a saturated water solution of PbI2 if the Ksp of lead iodide is 1.4 × 10–8?

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Ksp = 1.4x10^-8 = [Pb 2+][I-]^2

if we look at an ICE chart, we see the following:

[PbI2] .....[Pb 2+].....[2I-]
some.........0..............0
less...........+x.........+2x
less.........x..............2x

1.4x10^-8 = (x)(2x)^2 = 4x^3
3.5x10^-9 = x^3
x = 0.00152M = [Pb 2+] [I-] = 0.00304M
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