Calcium fluoride (CaF2) has a solubility constant of 3.45 x 10-11

. What is the molar solubility of CaF2 in water?

4.15 x 10-6 M

5.87 x 10-6 M

2.05 x 10-4 M

3.26 x 10-4 M

Question

Chemistry

Flowers

26 October, 03:55

Calcium fluoride (CaF2) has a solubility constant of 3.45 x 10-11

. What is the molar solubility of CaF2 in water?

4.15 x 10-6 M

5.87 x 10-6 M

2.05 x 10-4 M

3.26 x 10-4 M

+3

Answers (1)

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Kristian Strong · Answer 1

Ksp=3.45*10⁻¹¹

CaF₂ (s) ⇄ Ca²⁺ (aq) + 2F⁻ (aq)

Ksp=[Ca²⁺][F⁻]²

[Ca²⁺]=C (CaF₂)

[F⁻]=2C (CaF₂)

Ksp=4{C (CaF₂) }³

C (CaF₂) = ∛ (Ksp/4)

C (CaF₂) = ∛ (3.45*10⁻¹¹/4) = 2.05*10⁻⁴ mol/L

2.05*10⁻⁴ M

Calcium fluoride (CaF2) has a solubility constant of 3.45 x 10-11. What is the molar solubility of CaF2 in water?4.15 x 10-6 M5.87 x 10-6 M2.05 x 10-4 M3.26 x 10-4 M

Calcium fluoride (CaF2) has a solubility constant of 3.45 x 10-11

. What is the molar solubility of CaF2 in water?

4.15 x 10-6 M

5.87 x 10-6 M

2.05 x 10-4 M

3.26 x 10-4 M