Finding Ksp Solubility Product

Question

The molar solubility of Ag₂SO₄ in pure water is 1.4 × 10^–2 M.

Calculate Ksp.

Answer 1

Ag₂SO₄(s) <==> 2Ag⁺(aq) + SO₄^2-(aq) .. dissolution of solid Ag₂SO₄

Ksp = [Ag⁺]²[SO₄^2-]

[Ag⁺] = 2 x 1.4x10^-2 M = 2.8x10^-2 M

[SO₄^2-] = 1.4x10^-2 M

Ksp = (2.8x10^-2)²(2.8x10^-2)

Ksp = 2.20x10^-5