Question

The hydration energy of $M{g}^{2+}$ is greater than that of

• A. Na⁺
• B. Al³⁺
• C. Be²⁺
• D. All of the above

Answer 1

The correct option is A

Na⁺

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. Hence $N{a}^{+}$ is correct.

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