Chem question--solubility

Question

The solubility of Ag2CO3 in water is 0.035g in 1.0 L of water at 25 °C. What is the value of Ksp for Ag2CO3?

Answer 1

Ag₂CO₃(s) <==> 2Ag⁺(aq) + CO₃^2-(aq)

Ksp = [Ag⁺]²[CO₃^2-]

0.035 g Ag₂CO₃ x 1 mol/276 g = 1.27x10^-4 moles in 1 L = 1.27x10^-4 M = molar solubility

Ksp = [1.27x10^-4]²[1.27x10^-4]

Ksp = 2.05x10^-12