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Answer on Inorganic Chemistry Question for mujeeb rehman

Question #3365
Which element has greatest hydration energy, sodium ion or potassium ion?
Expert's answer
In row Li+, Na+, K+, Rb+, Cs+ hydration energy decrease.
This is due to increasing of ionic radius in this row.
For sodium ions hydration energy is 406 kJ/mol and for potassium ions it is 322 kJ/mol. So, answer is sodium ion.

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