Determine the mass fraction of oxygen in phosphoric acid.
| December 6, 2020 | education
The mass fraction of oxygen in phosphoric acid can be determined by the formula W = Ar / Mr * 100%. The formula for phosphoric acid is H3PO4 => Mr (H3PO4) = 3 * 1 + 4 * 16 + 31 = 98 amu. … Аr (O) = 16 * 4 = 64. Now we substitute the values: W (O) = 64/98 * 100≈65%
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