(1) sodium oxide: off-white.

(2) Sodium peroxide: light yellow.

2. Status

(1) sodium oxide: amorphous flake or powder at room temperature.

(2) Sodium peroxide: powdery solid.

3. Stability

(1) sodium oxide: It can react with acid to generate corresponding sodium salt and water.

(2) Sodium peroxide: easy to absorb moisture, soluble in ethanol, water and acid (essentially reacting with it), insoluble in alkali.

4. Reaction with water

(1) sodium oxide: it reacts with water to generate sodium hydroxide and water.

(2) Sodium peroxide: It can react with water and acid to generate sodium hydroxide and hydrogen peroxide (hydrogen peroxide will be decomposed into water and oxygen).

5. Reaction with carbon dioxide

(1) sodium oxide: It can react with carbon dioxide to generate sodium carbonate.

(2) Sodium peroxide: it can react with carbon dioxide to generate sodium carbonate and oxygen.

Extended data

Chemical properties of sodium peroxide

Sodium peroxide is an ionic compound, in which the valence of oxygen is-1 and that of sodium is+1. It can be dissolved in low-temperature sulfuric acid and then distilled under reduced pressure to obtain hydrogen peroxide.

Sodium peroxide can also oxidize some metals.

In alkaline environment, sodium peroxide can oxidize arsenic with valence +3 to valence +5 and chromium with valence +3 to valence +6. Trivalent chromium in some rock minerals can be removed by this reaction. Under normal circumstances, organic matter is oxidized into ethanol and carbonate.

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