JEE Main Chemistry question

Chemistry Equilibrium JEE Main

What is the solubility product of CaF₂, if its saturated solution contains 0.017 g of CaF₂ per litre?

(A)1.44×10⁻⁴
(B)4.14×10⁻¹¹Correct
(C)4.14×10⁻¹⁸
(D)41.4×10⁻²⁴

Answer: (B)

Solution

s=0.017/78=2.18×10⁻⁴ M; Ksp=4s³=4.14×10⁻¹¹.

Question ID VK-136371