When burning in oxygen 62 g of phosphorus received 130 g of phosphoric anhydride.
| December 30, 2020 | education
When burning in oxygen 62 g of phosphorus received 130 g of phosphoric anhydride. Calculate the mass fraction of the yield of phosphoric anhydride.
4P + 5O₂ = 2P₂O₅
n (P) / 2 = n (P₂O₅)
n (P) = 62 g / 31 g / mol = 2 mol
n (P₂O₅) = 2: 1 = 1 mol
m (P₂O₅) = n * M = 1 mol * 142 g / mol = 142 g
η (P₂O₅) = m (practical) / m (theory) * 100% = 130 g: 142 g * 100% = 91.55%
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