An aqueous solution of hydrated aluminium chloride contains the following set of ions

Options

A. `Al^(3+)` and `Cl^(-)`
B. `[AlCl_(2)(H_(2)O)_(4)]^(+)` and `[AlCl_(4)(H_(2)O)_(2)]^(-)`
C. `[Al(H_(2)O)_(6)]^(3+)` and `Cl^(-)`
D. `AlCl_(3)` and `H_(2)O`

Answer

B

Explanation

Hydrated aluminium chloride is `AlCl_(3).6H_(2)O`. It is ionic in nature and its aqueous solution contains
`[AlCl_(2)(H_(2)O)_(4)]^(+)` and `[AlCl_(4)(H_(2)O)_(2)]^(-)` ions
`AlCl_(3).6H_(2)Ooverset(ionisation) to [AlCl_(2)(H_(2)O)_(4)]^(+)+[AlCl_(4)(H_(2)O)_(2)]^(-)`