# Why is the aqueous solution of aluminium chloride acidic?

An aqueous solution of ${\text{AlCl}}_{3}$ is a product of the the neutralization reaction between hydrochloric acid ($\text{HCl}$) and aluminum hydroxide ( ${\text{Al(OH)}}_{3}$).
$\text{HCl}$ is a strong acid, and ${\text{Al(OH)}}_{3}$ is a weak base. When a strong acid solution and a weak base solution mix, the resulting saline solution will be slightly acidic, as the acid is stronger and "overpowers" the effects of the weak base, essentially.