Ksp - solubility product constant is equivalent to equilibrium constant, except this constant is used to determine the solubility of ions of a solid in a solution. ksp is the product of the soluble ions in the compound. Higher the ksp value, higher the degree of solubility. ZnCO₃ (s) ---> Zn²⁺ (aq) + CO₃²⁻ (aq) n n ksp = [Zn²⁺][CO₃²⁻] In the equation equal amounts of ions Zn²⁺ and CO₃²⁻ ions are soluble. amount of ions soluble = n ksp is therefore equal to; ksp = n x n ksp = n² ksp = 1 * 10⁻¹⁰ M therefore 1 * 10⁻¹⁰ M = n² n = 1 x 10⁻⁵ M therefore concentration of CO₃²⁻ = 1 x 10⁻⁵ M
