Question

Which of the following is insoluble in water?
(a)CaCl2
(b)CaF2
(c)CaBr2
(d)CaI2
Also, give reason

Answer 1

HELLO!!!! HERE IS YOUR ANSWER: CaF2 is insoluble in water. Because it has high lattice energy.

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Answer 2

Explanation:

CaF2 does not in any way dissolve in water. Fluoride is electronegative in nature, so that it contains the  least bonding forces between Ca2+. in addition to that the fluoride anions in this compound are very strong. Chloride is less electronegative so the CaCl2 leads to the formation of weaker bonds. They are tightly held as crystals. Water molecules do not have enough strength to get in between and dissolve it.