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Tanishka Sethi posted an Question
June 11, 2020 • 18:02 pm 15 points
  • IIT JAM
  • Chemistry (CY)

Caf2>mgf2>srf2> baf2> bef2 what is the reason for this order of melting point

CaF2>MgF2>SrF2> BaF2> BeF2 what is the reason for this order of melting point

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  • Suman Kumar best-answer

    Very small sized Be2+ cation has high hydration energy which is much higher than lattice energy. Hence, BeF2​ is highly soluble in water. The fluorides of other alkaline earth metals are insoluble in water as they have high lattice energies. The decreasing order of solubility of alkaline earth metal fluorides is Be2+>Mg2+>Ca2+>Sr2+>Ba2+.

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