Answer to Question #348428 in General Chemistry for Rae

Question

Describe an experiment to show preparation and collection of oxygen gas from sodium peroxide

Answer 1

It can react with carbon dioxide in the presence of water:

sodium peroxide + carbon dioxide + water → sodium bicarbonate + oxygen

2 Na2O2       + 4 CO2      + 2 H2O  → 4 NaHCO3       + O2

(This assumes a huge excess of carbon dioxide; sodium carbonate or sodium hydroxide are alternative products that might form if less carbon dioxide were available, or other acids might get into the action if present.)