Question

Write the chemical reaction that shows aluminium oxide reacts with acid as well as base.

Answer 1

Aluminium oxide is an amphoteric substance, meaning it can react with both acids and bases, such as hydrofluoric acid and sodium hydroxide, acting as an acid with a base and a base with an acid, neutralising the other and producing a salt. Al2O3 + 6 HF → 2 AlF3 + 3 H2O Al2O3 + 6 NaOH + 3 H2O → 2 Na3Al(OH)6 (sodium aluminate)