or the following equilibrium, if Ksp=5.2×10−12,

Question

or the following equilibrium, if Ksp=5.2×10−12, what is the molar solubility of cadmium(II) carbonate?

CdCO3(s)↽−−⇀Cd2+(aq)+CO2−3(aq)

 Report your answer in scientific notation with the correct number of significant figure

Answer 1

CdCO3 (s) <==> Cd²⁺ (aq) + CO₃^2- (aq)

K_sp = [Cd²⁺] [CO₃^2-] = 5.2 x 10^-12

Let x = [Cd²⁺] = [CO₃^2-]

(x)(x) = 5.2 x 10^-12

x² = 5.2 x 10^-12

x = √5.2 x 10^-12 = 2.3 x 10^-6

Molar solubility = 2.3 x 10^-6 M