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Question: Answered & Verified by Expert
$\mathrm{BeF}_2,$ is soluble in water whereas fluorides of other alkaline earth metals are insoluble because of
Chemistrys Block ElementsBITSATBITSAT 2020
Options:
  • A ionic nature of $\mathrm{BeF}_{2}$.
  • B covalent nature of $\mathrm{BeF}_{2}$
  • C greater hydration energy of $\mathrm{Be}^{2+}$ ion as compared to its lattice energy.
  • D none of these.
Solution:
2590 Upvotes Verified Answer
The correct answer is: greater hydration energy of $\mathrm{Be}^{2+}$ ion as compared to its lattice energy.
$\mathrm{Be}^{2+}$ being small in size is heavily hydrated and heat of hydration exceeds the lattice energy. Hence $\mathrm{BeF}_{2}$ is soluble in water.

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