Question

Which of the ions have maximum hydration energy? *

(a) Sr2+
(b) Ca2+
(c) Mg2+
(d) Be2+

Answer 1

correct option is

d. Be2+

1. This ion has small in size and high charge.

2. It has high polarizing power and can attract several water molecules.

3. Thus Be2+ has maximum hydration energy.

Answer 2

Correct answer is Option (d)

Hydration energy is the amount of energy released when ions undergo hydration.

Explanation:

Hydration energy is the component that is used for quantitative analysis of solvation.

Metal ions with highly charged and smaller size have high hydration energy

Hydration energy for compact charged ions is greater than large-sized ions

Be²⁺ will have a small size and high charge

It has a high polarising capability and can attract water

Hence it has the highest hydration energy.

Answer is Option (d)