The ksp of cobalt (ii) carbonate, coco3, is 1.0 * 10-10. calculate the solubility of this compound in g/l.

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