Question

AL2O3 дать определение амфотерным оксидам

Answer 1

Оксиды металлов с валентностью -  2,3

Answer 2

Definition of Amphoteric Oxides

Al2O3 is an example of an amphoteric oxide. Amphoteric oxides are compounds that can act as both acidic and basic oxides, depending on the reaction conditions. They can react with both acids and bases.

In the case of Al2O3 specifically, it can react with both acids and bases:

- With acids: Al2O3 can react with acids to form salts and water. - With bases: Al2O3 can react with bases to form complex ions.

The amphoteric nature of Al2O3 is due to its ability to accept or donate protons depending on the reaction conditions.

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Examples of Amphoteric Oxides

Other examples of amphoteric oxides include ZnO, BeO, and PbO. These oxides also exhibit similar behavior, being able to react with both acids and bases.

Chemical Reactions

Chemical reactions involving Al2O3 can illustrate its amphoteric behavior. For example: - With acids: Al2O3 + 3H2SO4 → Al2(SO4)3 + 3H2O - With bases: Al2O3 + 2NaOH → 2NaAlO2 + H2O

These reactions demonstrate the ability of Al2O3 to react with both acids and bases, showcasing its amphoteric nature.

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