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  Phosphorus trioxide

Phosphorus trioxide: P2O3 or P4O6:

It is acquired by the combustion of phosphorus in an inadequate supply of air.

4P + 3O2 → 2P2O3

Physical properties:

1. It is white waxy material.
2. It has a garlic odor.

Chemical properties:

1. It reacts with cold water, provides phosphorus acid.

P2O3 +3H2O → 2H3PO3

2. It reacts with hot water strongly to form inflammable phosphine.

2P2O3 + 6H2O →   PH3 ↑ + 3H3PO4

 

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