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Solid-Liquid Equillibrium

A large exces...

Question

A large excess of ${M g F}_{2} (s)$ is maintained in contact with 1.00 L of pure water to produce a saturated solution. When an additional 1.00 L of pure water is added to the solid liquid mixture and equilibrium re-established, compared to its value in the original saturated solution $[{M g}^{2 +}]$ will be :

A

the same

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B

twice as large

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C

three as large

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D

half as large

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Solution

The correct option is A the same
The concentration of magnesium ion will be same even when the volume of water is doubled from 1.00 L to 2.00 L as magnesium fluoride is present in the large excess and the solution formed before and after addition of additional water is saturated solution

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