Which of the following has highest hydration energy ?

Options

A. `MgCl_(2)`
B. `CaCl_(2)`
C. `BaCl_(2)`
D. `SrCl_(2)`

Answer

A

Explanation

Smaller sized and highly charged metal atoms have higher hydration energy. In the alkaline earth metal, the hydration energy for the compact and charged ions is greater than the large sized charged ions. Therefore , order of hydration energy in this group is `Be^(2+) gt Mg^(2+) gt Ca^(2+) gt Sr^(2+) gt Ba^(2+)`