Alkali metal salts ionic and soluble in ...

Alkali metal salts ionic and soluble in water. The solubility of an ionic compound depends on (i) lattic ethalpy and (ii) hydration enthalpy. These two factor oppose each other. If hydration ethalpy is high, the ions will have greater tendency to be hydrated and therefore the solubility will be high. The smaller the cation, the greater is the degree of hydration. The reducing behaviour of alkali metals in solution is also dependent on the hydration enthalpy besides other factors.
Which of the following is the strongest reducing agent

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Alkali metal salts ionic and soluble in water. The solubility of an ionic compound depends on (i) lattic ethalpy and (ii) hydration enthalpy. These two factor oppose each other. If hydration ethalpy is high, the ions will have greater tendency to be hydrated and therefore the solubility will be high. The smaller the cation, the greater is the degree of hydration. The reducing behaviour of alkali metals in solution is also dependent on the hydration enthalpy besides other factors. The hydration energy is maximum for

`Li^(o+)`

`Na^(o+)`

`K^(o+)`

`Rb^(o+)`

`Li_((aq))^(o+)`

`Na_((aq))^(o+)`

`K_((aq))^(o+)`

`Rb_((aq))^(o+)`

`Li^(o+)` ion has a high charge density.

`Li^(o+)` ion has the highest hydration tendency.

`Li^(o+)` ion has the highest ionisation enthalpy.

`Li^(o+)` ion has two electrons.