The solubility of alkali metal fluorides incr | vedclass

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Question

(C) The solubility of an ionic compound depends on the balance between its lattice energy and hydration energy. As we move down the group,the size of

Vedclass · Accepted Answer

Both energies decrease down the group,but the decrease in lattice energy is more rapid.

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(C) The solubility of an ionic compound depends on the balance between its lattice energy and hydration energy. As we move down the group,the size of the alkali metal cation increases. Both the lattice energy and the hydration energy decrease as the ionic radius increases. However,the decrease in lattice energy is more rapid than the decrease in hydration energy. Since the lattice energy decreases more significantly,the energy required to break the crystal lattice is more easily compensated by the hydration energy,leading to an increase in solubility down the group. Therefore,the correct option is $(C)$.

The solubility of alkali metal fluorides increases down the group. Select the correct explanation for the given statement.

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