Which of the following ions will have the maximum hydration energy ?

Options

A. `Sr ^(2+)`
B. `Ba ^(2+)`
C. `Ca ^(2+)`
D. `Mg ^(2+)`

Answer

D

Explanation

Hydration energies of smaller cations are higher then those of larger cations. Hence, `Mg ^(2+)` has the maximum hydration energy among the given options.