when Cobalt carbonate dissolves in water it dissociates as follows; CoCO₃ --> Co²⁺ + CO₃²⁻ if the molar solubility of CoCO₃ is x then solubility of Co²⁺ is x and CO³⁻ is x as well. Molar solubility is the number of moles of solute that are dissolved in 1 L of solution. the formula for solubility product constant - ksp is as follows ksp = [Co²⁺][CO₃²⁻] ksp = x² ksp = 1.0 x 10⁻¹⁰ x² = 1.0 x 10⁻¹⁰ x = 1.0 x 10⁻⁵ therefore molar solubility of CoCO₃ is 1.0 x 10⁻⁵M molar mass of CoCO₃ is 119 g/mol therefore solubility of CoCO₃ is 119 g/mol x 1.0 x 10⁻⁵ mol/L = 1.19 x 10⁻³ g/L
