-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 Ksp expression = [Mg][F]^2
when Ksp = 8.4 x 10^-8
[F] = 0.42
by substitution:
∴8.4 x 10^-8 = [Mg+] * (0.42)^2
∴[Mg+] = 4.8 x 10^-7 M
∴the solubility of MgF2 = 4.8 x 10^-7
