genie in bottle

Manganese dioxide +  30% Hydrogen peroxide  =  Gaseous oxygen will be emitted from the bottle. The reaction is exothermic; the soda bottle will get hot and shrink slightly.



Oxygen is a colorless, odorless gas at room temperature and atmospheric pressure. The oxygen is a unique component of air. Here oxygen is formed from the decomposition of hydrogen peroxide.

 Hydrogen peroxide is not a very stable compound and its decomposition can be induced by many means. Light will decompose it. The surface of manganese dioxide provides a particularly favorable environment to catalyze the decomposition.