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Chem Demos | Dr. Alexey Ignatchenko research group homepage Chem Demos | Dr. Alexey Ignatchenko research group homepage
                       
Genie in the bottle

Decomposition of H2O2 catalyzed by MnO2

Mix 50ml of 30% H2O2 with 0.5 g of manganese dioxide serving as a catalyst. Quick exothermic decomposition of hydrogen peroxide will produce smoke made of oxygen and steam.

Safety

Avoid contact of H2O2 with skin
. Wear safety goggles. 
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Genie in the bottle.