What is the conversion factor from orthophosphate (PO4) to phosphorus pentoxide (P2O5)?

Document ID

Document ID TE378

Version

Version 4.0

Status

Status Published

Published Date

Published Date 08/23/2018
Question
What is the conversion factor from orthophosphate (PO4) to phosphorus pentoxide (P2O5)?
Summary
Convert orthophosphate (PO4) to phosphorus pentoxide (P2O5)
Answer
The conversion factor from orthophosphate (PO4) to phosphorus pentoxide (P2O5) is 0.7473. This conversion is based on the molar mass ratio for the two compounds. For each PO4 molecule there is 1 phosphorus (P) atom whereas for each P2O5 molecule, there are 2 phosphorus (P) atoms. This additional factor of 2 is accounted for in the 0.7473 conversion.

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