Question

The hydration energy of Mg2+ is greater than that of .

• A. $N{a}^{+}$
• B. $A{l}^{3+}$
• C. $B{e}^{2+}$

Answer 1

The correct option is A $N{a}^{+}$

With the same charge, $B{e}^{2+}$ has greater charge density than $M{g}^{2+}$. $A{l}^{3+}$'s charge density is even higher.

The more the charge density, the greater the extent of hydration.

Hydration of $M{g}^{2+}>N{a}^{+}$