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In which of the following would calcium fluoride be most soluble? 1 M KNO3 1M HF...

In which of the following would calcium fluoride be most soluble?

1 M KNO3

1M HF

1M CaCl2

1M KF

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Answer #1

Calcium fluoride(CaF2) is essentially insoluble in water.

The Ksp of the CaF2 is

In the solution of , the solubility will be reduced due to common ion but only KNO3 will not affect the solubility of CaF2.

Hence in 1M KNO3 , the is most soluble.

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