Phosphorus pentoxide P2O5 or P4O10:
Phosphorus pentoxide can be made by burning phosphorus with adequate supply of air.
P4 + 5O2 → P4 O10Physical properties:
It is an acidic oxide and a white solid.Chemical properties:
1. It reacts with moisture to generate metaphosphoric acid.
P4O10 + 2H2O → 4HPO3Whenever the solution is boiled, the metaphosphoric acid is modified to orthophosphoric acid.
HPO3 + H2O → H3PO4 or P4O10 + 6H2O → 4H3PO42. Phosphorus pentoxide extracts water from numerous inorganic compounds involving sulphuric acid, nitric acid and numerous organic compounds. It is thus, utilized as a powerful dehydrating agent.
Use:
It is employed as a dehydrating agent.
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