when cobalt (II) hydroxide dissolves, it dissociates into the following ions, Co(OH)₂ --> Co²⁺ + 2OH⁻ molar solubility is the number of moles that are dissolved in 1 L of solution. If molar solubility of Co(OH)₂ is X, then molar solubility of Co²⁺ is X and molar solubility of OH⁻ is 2X. the formula for solubility product constant - ksp is as follows; ksp = [Co²⁺][OH⁻]² ksp = (X) * (2X)² ksp = 4X³ ksp = 5.92 x 10⁻¹⁵ 4X³ = 5.92 x 10⁻¹⁵ X = 1.14 x 10⁻⁵ M molar solubility of Co(OH)₂ is 1.14 x 10⁻⁵ M solubility of compound - 1.14 x 10⁻⁵ mol/L x 93 g/mol = 1.06 x 10⁻³ g/L
