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p-Block Elements - I
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Aluminium chloride exists as dimer, $Al_2Cl_6$ in solid state as well as in soluiton of non-polar solvents such as $C_6H_6.$ When dissolved in water it gives :
A
$Al_2O_3 + 6HCl$
B
$[Al(H_2O)_6]+ 3Cl^-$
C
$[Al(OH)_6]^{3-} + 3HCl$
D
$Al^{3+} + 3Cl^-$
Solution
Aluminium chloride exists as dimer $\left(\mathrm{Al}_{2} \mathrm{Cl}_{6}\right)$ in a solid state as well as in solution of non-polar solvents such as benzene. When dissolved in water, it gives
$\left[\mathrm{Al}(\mathrm{OH})_{6}\right]^{3-}+3 \mathrm{HCl}$
$\mathrm{Al}_{2} \mathrm{Cl}_{6}+12 \mathrm{H}_{2} \mathrm{O} \rightarrow 2\left[\mathrm{Al}(\mathrm{OH})_{6}\right]^{3-}+12 \mathrm{HCl}$
Thus aluminum chloride is hydrolyzed to form the complex ion containing s hydroxide groups.
Standard 11
Chemistry
