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(C) The solubility of alkaline earth metal fluorides is governed by the balance between lattice energy and hydration energy. $BeF_2$ is highly soluble

Vedclass · Accepted Answer

$MgF_2 < CaF_2 < SrF_2 < BeF_2$

Vedclass · Answer

(C) The solubility of alkaline earth metal fluorides is governed by the balance between lattice energy and hydration energy. $BeF_2$ is highly soluble in water due to the very high hydration energy of the small $Be^{2+}$ ion,which compensates for its lattice energy. As the size of the cation increases from $Be^{2+}$ to $Ba^{2+}$,the hydration energy decreases significantly,leading to a decrease in solubility. Therefore,the correct order is $MgF_2 < CaF_2 < SrF_2 < BeF_2$.

Which of the following represents the correct order of solubility in water?

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