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Ingredients:

hydrogen peroxide

thistle funnel

delivery tube

conical flask

manganese dioxide

water

trough

glass jar

beehive shelf

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Some manganese dioxide and water is taken in a conical flask
Add some Hydrogen peroxide dropwise through the thistle
We can observe that o2 gas comes out of the delivery tube
Oxygen gas is collected by the downward displacement of water

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Oxygen can be made from hydrogen peroxide, which decomposes slowly to form water and oxygen. The rate of reaction can be increased by using a catalyst, manganese(IV) oxide. When manganese(IV) oxide is added to hydrogen peroxide, bubbles of oxygen are given off.

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Hydrogen peroxide (H2O2) is usually preferred for lab preparation of oxygen in the laboratory with the help of a catalyst, manganese dioxide (MnO2).