The concentrations of lead and carbonate ions in a saturated aqueous solution of PbCO3 are both 1.82×10−7 M . Calculate the solubility product, 𝐾sp , for PbCO3 .

Question

The concentrations of lead and carbonate ions in a saturated aqueous solution of PbCO3PbCO3 are both 1.82×10−7 M1.82×10−7 M. Calculate the solubility product, Ksp, for PbCO3PbCO3.

Ksp = ________

Answer 1

PbCO₃(s) <==> Pb²⁺(aq) + CO₃^2-(aq) .. equation for the dissolution of PbCO₃(s)

Ksp = [Pb²⁺][CO₃^2-]

Ksp = (1.82x10^-7)(1.82x10^-7)

Ksp = 3.31x10^-14