Which of the following cation has highest hydration energy?

H

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L i

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N a

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K

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Solution

The correct option is D $H$
Hydration energy is directly proportional to charge present on ion, and it is inversely proportional to size of ion. Among given ions $A l^{3 +}$ have more charge and least size. So, $A l^{3 +}$ has highest hydration energy.

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Similar questions

Hydration energy ${Δ H}_{h y d r a} . (k J m o l^{- 1})$	Lattice energy $Δ H_{u} (k J m o l^{- 1})$
$L i^{+}$ -499	LiCl-840
$N a^{+}$ -390	NaCl-776
$K^{+}$ -305	KCl-703
$C l^{-}$ -382

L i^{+} (a q .)

L i^{+} (a q .)

L i^{+}

N a^{+}

C s^{+}

Hydration energy ${Δ H}_{h y d r a} . (k J m o l^{- 1})$	Lattice energy $Δ H_{u} (k J m o l^{- 1})$
$L i^{+}$ -499	LiCl-840
$N a^{+}$ -390	NaCl-776
$K^{+}$ -305	KCl-703
$C l^{-}$ -382

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