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  4. The aqueous solution of AlCl3 is acidic due to the hydrolysis of

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Q. The aqueous solution of $AlCl_{3}$ is acidic due to the hydrolysis of

NTA AbhyasNTA Abhyas 2020The p-Block Elements - Part2

Solution:

The aqueous solution of $AlCl _{3}$ is acidic due to the hydrolysis of aluminium
ion.
$Al ^{3+}+6 H _{2} O \rightarrow\left[ Al \left( H _{2} O \right)_{6}\right]^{3+}+3 Cl ^{-}$
$Al \left( OH _{2}\right)_{6}^{3+}+ H _{2} O \rightarrow\left[ Al \left( H _{2} O \right)_{5}( OH )\right]^{2+}+ H _{3} O ^{+}$
alt hydrolysis
$Cl ^{-}$ does not hydrolyse.