Question

Aluminum chloride exists as dimer $\left(A{l}_{2}C{l}_6\right)$ in the solid state as well as in solution Anhydrous aluminum chloride is hydrolyzed partly with the moisture in the atmosphere to give $HCl$ gas. This $HCl$ combines with the moisture in the air appears white in color of non-polar solvents such as benzene. When dissolved in water, it gives:

• A. $[Al{\left(OH\right)}_6{]}^{3-}+3HCl$
• B. $[Al{\left(H_{2}O\right)}_6{]}^{3+}+3HCl$
• C. $A{l}^{+3}+3C{l}^{-}$
• D. $A{l}_2{O}_3+6HCl$

Answer 1

Answer: (B)

$[Al{\left(H_{2}O\right)}_6{]}^{3+}+3HCl$

Aluminium chloride exists as dimer $\left(A{l}_{2}C{l}_6\right)$ in a solid state as well as in solution of non-polar solvents such as benzene. When dissolved in water, it gives
$[Al{\left(OH\right)}_6{]}^{3-}+3HCl$
$A{l}_{2}C{l}_6+12H_{2}O\to 2[Al{\left(OH\right)}_6{]}^{3-}+12HCl$
Thus aluminum chloride is hydrolyzed to form the complex ion containing s hydroxide groups.