Ksp value calculation

Question

Calculate the Ksp value for lithium carbonate if its solubility is 7.4×10−2 mol/L

Answer 1

Li₂CO₃ ==> 2Li⁺ + CO₃^2-

Ksp = [Li⁺]²[CO₃^2-]

7.4x10^-2 M Li₂CO₃ ==> 2 x 7.4x10^-2 Li⁺ and 7.4x10^-2 CO₃^2-

Ksp = (1.48x10^-1)²(7.4x10^-2) = 1.6x10^-2