Phosphorus trioxide: P2O3 or P4O6:It is acquired by the combustion of phosphorus in an inadequate supply of air.
4P + 3O2 → 2P2O3Physical 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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