What are amphoteric oxides? Give two examples of amphoteric oxides.
Amphoteric oxides are metal oxides that can react with both acids and bases, exhibiting both acidic and basic properties. Examples include aluminum oxide (Al₂O₃) and zinc oxide (ZnO).
Elaboration:
Amphoteric oxides, also known as amphiprotic oxides, are unique because they can act as either an acid or a base, depending on the reaction conditions.
Examples:
Aluminium oxide (Al₂O₃):
This compound reacts with acids to form aluminium salts and water, and with bases to form aluminate salts and water.
Zinc oxide (ZnO):
Similarly, zinc oxide reacts with both acids and bases to form salts and water, demonstrating its amphoteric nature.