Preparation Of Oxygen Using Hydrogen Peroxide

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Chemical Properties of Hydrogen Peroxide

Place the hydrogen peroxide solution in the flask. Ad a small amount of
manganese dioxide or other suitable catalyst to speed up the decomposition of the
hydrogen peroxide. Note that the solution is bubbling.
Light a candle or a burner.
Holding a wood splint with tongs, light the end of the wood splint. Allow it to
burn for a few seconds until you notice that the end of the wood splint is glowing
red. Blow out the flame. Insert the glowing end of the wood splint into the flask.
If sufficient oxygen has been generated, the wood splint will burst into flame.
Withdraw the burning splint from the flask.
This demonstration can be repeated several times until the reaction has ceased.
EXPLANATION
This reaction is the catalytic decomposition of hydrogen peroxide:
2 H2O2 → 2 H2O + O2
This is the classic test for oxygen gas.

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