BRAINCAKEAmphoteric Aluminium Oxide
An amphoteric oxide reacts with both acids and bases. Aluminium oxide is the amphoteric oxide in Period 3.
With acids, Al2O3 acts as a base, forming an aluminium salt and water:
Al2O3 + 6HCl → 2AlCl3 + 3H2O
Al2O3 + 3H2SO4 → Al2(SO4)3 + 3H2O
Al2O3 + 3H2SO4 → Al2(SO4)3 + 3H2O
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Key terms in this lesson
- polarisation
- The distortion of the electron cloud of a negative ion caused by the attraction of a nearby positive ion, giving the bond some covalent character.
More in Period 3 Elements and Oxides
- Reactions of Sodium and Magnesium with Water
- Reactions of Period 3 Elements with Oxygen
- Period 3 Oxides
- Melting Points of Period 3 Oxides
- Reactions of Period 3 Oxides with Water
- pH of Period 3 Oxide Solutions
- Acid-Base Character of Period 3 Oxides
- Equations for Period 3 Oxides with Acids and Bases
All 10 lessons in Period 3 Elements and Oxides · All AQA A-level Chemistry topics