1. reacts with water to generate the corresponding acid (except that SiO2 does not react with water).

2. The reaction with alkali only produces one kind of salt and water.

3. Reaction with basic oxides

Reaction law of basic oxides

1, basic oxide+acid = salt+water

2. Acidic oxide+basic oxyacid = salt+water

Extended data:

Matters needing attention of acidic oxides and basic oxides

I. Acid oxides

1, and most of the acidic oxides are nonmetallic oxides.

2. Most nonmetallic oxides are acidic oxides.

3. Oxyacids have acidic oxides.

4. Carbon monoxide, nitric oxide and nitrogen dioxide are not acid oxides.

Second, basic oxides.

1, the oxide that can react with acid is not necessarily an alkaline oxide, for example, SiO2 can react with HF (hydrofluoric acid), and SiO2 is an acidic oxide, not an alkaline oxide (it should be noted that SiO2 can react with HF, which is a characteristic of SiO2, regardless of whether it is an alkaline oxide or an acidic oxide).

2. Alkali metal oxides are not necessarily basic oxides. For example, Na2O2 can react with water to form alkali, but it is peroxide rather than basic oxide. Because it produces oxygen in addition to alkali, it is not an alkaline oxide.

Baidu encyclopedia-acid oxide

Baidu encyclopedia-alkaline oxide