-when Ksp is the solubility product constant for a solid substance when it
dissolved in the solution, and measure how a solute dissolves in the solution.
- and when the solubility is the maximum quantity of solute which can dissolve in a certain solution.
so according to the reaction equation:
MgCO3 ↔ Mg2+ + CO32-
when the Ksp expression = [Mg2+][CO32-]
and when Ksp MgCO3= 6.82 x 10^-6
and we assume [Mg2+]=[CO32-] = X
and we assume the solubility is X
by substitution:
6.82 x 10^-6 = X^2
∴ X = √(6.82 X 10^-6)
= 0.0026 M
∴ the solubility is 0.0026 M