Question

Heating an aqueous solution of aluminium chloride to dryness will give

• A.
• B.
• C.
• D.

Answer 1

The correct option is B

In aqueous solution, $AlC{l}_{3}existsas2AlC{l}_3+6H_{2}O\leftrightharpoons \left[AlC{l}_2\right(H_{2}O{)}_4\left(aq\right){]}^{+}+\left[AlC{l}_4\right(H_{2}O{)}_2{]}^{-}$(aq) on crystallization of aqueous solution, it gives ionic solid having the composition $\left[AlC{l}_2\right(H_{2}O{)}_4]+[AlC{l}_4(H_{2}O{)}_2{]}^{-}$ which on heating gives $A{l}_{2}C{l}_6$