The ion with maximum hydrated ionic radii is

  • Option 1)

    Li^{+}

  • Option 2)

    Mg^{2+}

  • Option 3)

    K^{+}

  • Option 4)

    Ba^{+}

 

Answers (1)
V Vakul

As we learnt in 

Hydration energy of alkaline earth metals -

Decreases down the group. Larger than alkali metal ions

- wherein

Hydration energies of divalent cations is much more than monovalent cation

 

Hydration tendency of alkaline earth metals is higher than alkali metals because of greater charge density. Also the tendency decreases down the group as size increases. 

Therefore, Mg2+ has maximum hydrated ionic radii. 

 


Option 1)

Li^{+}

This option is incorrect

Option 2)

Mg^{2+}

This option is correct

Option 3)

K^{+}

This option is incorrect

Option 4)

Ba^{+}

This option is incorrect

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