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Calculate the molar solubility of lead thiocyanate in pure water. The molar solubility is the maximum amount of lead thiocyanate...?
Calculate the molar solubility of lead thiocyanate in pure water. The molar solubility is the maximum amount of lead thiocyanate the solution can hold.
Express your answer with the appropriate units.
Lead thiocyanate, Pb(SCN)2, has a Ksp value of 2.00×10−5.
Lead thiocyanate's ksp value is 2.00 x 10^-5
1 Answer
- Roger the MoleLv 75 days ago
Pb(SCN)2 → Pb{2+} + 2 SCN{-}
[SCN{-}] = 2 [Pb{2+}]
Ksp = [Pb{2+}] [SCN{-}]^2 = [Pb{2+}] [2 [Pb{2+}]]^2 = 4 x [Pb{2+}]^3 = 2.00 x 10^-5
Solve for [Pb{2+}] algebraically:
[Pb{2+}] = 0.017100 M
So the solubility of Pb(SCN)2 is 0.0171 mol/L.
