The chloride ion concentration in a saturated solution of lead (II) chloride is

Question

The chloride ion concentration in a saturated solution of lead (II) chloride is .032M
A. What is the ksp for lead (II) chloride? (Show work) B. Will the molar solubility of lead (II) chloride will be larger, smaller, or the same at low pH compared to molar solubility at high pH? The chloride ion concentration in a saturated solution of lead (II) chloride is .032M
A. What is the ksp for lead (II) chloride? (Show work) B. Will the molar solubility of lead (II) chloride will be larger, smaller, or the same at low pH compared to molar solubility at high pH?
A. What is the ksp for lead (II) chloride? (Show work) B. Will the molar solubility of lead (II) chloride will be larger, smaller, or the same at low pH compared to molar solubility at high pH?

Explanation / Answer

Cl- = 0.032

PbCl2 <-> PB+2 + 2Cl-

Ksp = (S)(2S)^2

Ksp = 4S^3

S = 0.032/2 = 0.016

then

Ksp = 4S^3 = 4*(0.016^3) = 0.000016384

b.

if pH is low, there is no pB(OH)2 precipitation, therefore it will be "normal"

if pH is high, there is plent y oh OH ions that preicptiate as Pb(OH)2, therefore the shift goes toward more Pb+2 ions, that is, more soluble in high pH

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