What is the molar solubility of MgF2 in a 0.38 M NaF solution? For MgF2, Ksp = 8.4 × 10–8.
MgF2 <-----------> Mg+2 + 2F-
Ksp = [Mg+2][F-]2
[Mg+2] = S mol/L
[F-] from MgF2 = 2S mol /L
[F-] from NaF = 0.38 M
2S < < 0.38
so [F-] = 0.38 M
Ksp = 8.4 x 10-8
8.4 x 10-4 = [S] [0.38]2
8.4 x 10-4 = [S] 0.1444
S = 5.8 x 10-3 mol/L
What is the molar solubility of MgF2 in a 0.38 M NaF solution? For MgF2, Ksp...
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