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Question: The solubility of \(CaF_{2}\) is\(2 \times 10^{- 4}moles/litre.\) Its solubility product \((K_{sp})\...

The solubility of CaF2CaF_{2} is2×10−4moles/litre.2 \times 10^{- 4}moles/litre. Its solubility product (Ksp)(K_{sp}) is.

A

2.0×10−42.0 \times 10^{- 4}

B

4.0×10−34.0 \times 10^{- 3}

C

8.0×10−128.0 \times 10^{- 12}

D

3.2×10−113.2 \times 10^{- 11}

Answer

3.2×10−113.2 \times 10^{- 11}

Explanation

Solution

KspK_{sp}for CaF2=4s3CaF_{2} = 4s^{3} =4×[2×10−4]3=3.2×10−11= 4 \times \lbrack 2 \times 10^{- 4}\rbrack^{3} = 3.2 \times 10^{- 11}.