disscuss the relation of hydration energy with size and charge on the ions?
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As the size of ion increases its polasiation tendency decreases therefore the tendency to polarise nearby water molecules decreases hence decreasing its hydration radii. This effect can be seen by observing the trend of hydartion radii in alkali metal ions.
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Hydration energy is directly proportional to charge present on ion, and it is inversely proportional to size of ion. Among given ions Al3+ have more charge and least size. So, Al3+ has highest hydration energy.
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