What is the molar solubility of calcium fluoride ( caf2) in water? the solubility-product constant for caf2 is 3.9 ⋅ 10-11 at 25 °c. what is the molar solubility of calcium fluoride ( caf2) in water? the solubility-product constant for caf2 is 3.9 10-11 at 25 °c. 3.4 ⋅ 10-4 8.8 ⋅ 10-6 3.1 ⋅ 10-6 1.3 ⋅ 10-11 2.1 ⋅ 10-4

The molar solubility of calcium fluoride ( CaF₂) in water = 2.1×10⁻⁴ M

Explanation:

Given:

The solubility product constant of Calcium fluoride = 3.9×10⁻¹¹

To find the solubility of Calcium fluoride in water.

Consider the ICE take for the solubility of the solid, CaF₂ as:

                                  CaF₂    ⇄     Ca²⁺ +    2F⁻

At t=0                            x                 -              -

At t =equilibrium         x-s                s           2s          

The expression for Solubility product for CaF₂ is:

Applying values from the table as:

Thus, solubility = 2.1×10⁻⁴ M

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