2. You can calculate the solubility of a metal carbonate in pure water using the Ksp of the sparingly soluble salt and the Kb expression for the hydrolysis of carbonate
ion.
This leads to the pseudo-quadratic equation in which x is the solubility of metal
carbonate.
*? - VK, K,- K,, -
= 0
Consider CaCO3. Where the Ksp=4.7x10-9 with the carbonate Kb = 2.1x10-4
Use the method of successive approximations to the find the solubility of CaCO3
to at least three significant figures.