Question

4.
Solubility of alkali metal hydroxides increases down the group because
A) Hydration energy increases and lattice energy decreases down the group
B) Both energy decrease down the group but decrease in hydration energy is rapid
C) Both energy decrease down the group but decrease in lattice energy is rapid
D) Both energy increase down the group but increase in lattice energy is rapid
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Answer 1

Answer:

A) Hydration energy increases and lattice energy decreases down the group

Explanation:

Among alkaline earth metal hydroxides, the anion being common, the cationic radius will influence the lattice enthalpy.

Since lattice enthalpy decreases much more than the hydration enthalpy with increasing ionic size, the solubility increases down the group.

Answer 2

Answer:

option a

Hydration energy increases and lattice energy decreases down the group

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