Arrange the following ions `Na^(+) , Mg^(2+) , Al^(3+)` in increasing
hydration energy

Explanation

To arrange the ions \( \text{Na}^+ \), \( \text{Mg}^{2+} \), and \( \text{Al}^{3+} \) in increasing order of hydration energy, we can follow these steps:

### Step 1: Understand Hydration Energy
Hydration energy is the amount of energy released when one mole of an ion is surrounded by water molecules. The greater the charge of the ion and the smaller its size, the higher the hydration energy.

### Step 2: Analyze the Ions
- **Sodium Ion (\( \text{Na}^+ \))**: Has a +1 charge and a relatively larger ionic radius.
- **Magnesium Ion (\( \text{Mg}^{2+} \))**: Has a +2 charge and a smaller ionic radius compared to sodium.
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