The Ksp of PbBr2 is 6.60 times 10-6 What is the moral solubility of PbBr2 in pur

Question

The Ksp of PbBr2 is 6.60 times 10-6 What is the moral solubility of PbBr2 in pure water? What is the moral solubility of PbBr2 in 0.500 M KBr solution? What is the moral solubility of PbBr2 in 0.500 M Pb (NO3)2 solution?

Explanation / Answer

PbBr2 ===> Pb2+ + 2Br- Ksp = [Pb2+][Br-]^2 = 6.6 x 10^-6 The molar solubility of PbBr2 = [Pb2+] Let [Pb2+] = x. Then [Br-] = 2x, and (x)(2x)^2 = 6.6 x 10^-6 4x^3 = 6.6 x 10^-6 x^3 = 1.65 x 10^-6 x = 1.18 x 10^-2 = molar solubility of PbBr2 in pure water. For 0.5 M Kbr solution we use [Br-]=0.5M and solve the rest as above and For 0.5 M Pb(NO3) solution, we use [Pb2+]=0.5M and solve the rest to get the result

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