Which acid is richer than phosphoric – orthophosphoric H3PO4 or metaphosphoric HPO3?
| March 8, 2021 | education
In order to determine which of these two acids contains more phosphorus in a mass fraction, it is necessary to first determine the molar mass of these acids.
The molar mass of orthophosphoric acid (H3PO4) is 1 * 3 + 31 + 16 * 4 = 98 grams / mol.
98 grams of this acid contains 31 grams of phosphorus, that is, 31/98 = 31.6%.
The molar mass of metaphosphoric acid (HPO3) is 1 + 31 + 16 * 3 = 80 grams / mol.
80 grams of this acid contains 31 grams of phosphorus, that is, 31/80 = 38.8%.
Consequently, the mass content of phosphorus is higher in matforic acid.
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