Give reason.the hydration energies of the ions are in the following order Al3+>Mg2+>Na+?



Answer:
The hydration energies depend mainly on the charge/mass ratio of a species.

We have the charges increasing in the order Na+ to Al+3. Also, we have the ionic sizes reducing in that order. So we have the charge/mass ratio that increases in the ratio Na(+)<Mg(+2)<Al(+3)

So, we have the hydration energies increasing in that order as well.

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