Arrange in the increasing order of hydration energies of $$\text{Be}^{2+}$$, $$\text{Ca}^{2+}$$, $$\text{Mg}^{2+}$$, $$\text{Ba}^{2+}$$, $$\text{Sr}^{2+}$$

Correct Answer: 0

Solution

PLACEHOLDER ANSWER - the answer is an order of ions. Hydration energy decreases as ionic size increases, and ionic size increases down the group. So the increasing order of hydration energy is $$\text{Ba}^{2+} < \text{Sr}^{2+} < \text{Ca}^{2+} < \text{Mg}^{2+} < \text{Be}^{2+}$$.

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