The ksp for caf2 is 3.9 x 10-11 at 25oc. what is the solubility? a. 4.1 x 10-3 molar b. 3.9 x 10-3 molar c. 2.1 x 10-4 molar d. 4.1 x 10-4 molar e. 3.9 x 10-11 molar

We have to know the solubility of CaF₂.

The solubility of CaF₂ is: (c) 2.1 x 10-4 Molar

The general expression of solubility product of any sparingly soluble salt (having solubility S) with formula is: .

For the compound, CaF₂, x=1, y=2 So, ==4S³= 3.9 x 10-11  (Given)

S³=

S³=9.75  X

S= 2.1 X Molar