|Class 12 Chemistry P Block Elements||Preparation of Dioxygen|
Preparation of dioxygen
General method of preparation:
We get oxygen whenever we heat any metal oxide like:
In laboratory we prepare oxygen by:
By heating potassium chlorate
This reaction occurs on heating, in presence of MnO2 at 420k.
Industrial preparation: By electrolysis of water.
The silent electric discharge is passed so that the reaction do not becomes reversible.
H2 + O2 ---> H2O