Determine the mass of phosphorus oxide formed by the interaction of 50 g of phosphorus with oxygen.
March 19, 2021 | education
| The synthesis reaction of phosphorus oxide is described by the following chemical reaction equation:
4P + 5O2 = 2P2O5;
4 moles of phosphorus react with 5 moles of oxygen. In this reaction, 2 moles of phosphorus oxide are synthesized.
Let’s calculate the chemical amount of a substance in phosphorus weighing 9.1 grams.
M P = 31 grams / mol;
N P = 50/31 = 1.613 mol;
From this amount of phosphorus, it is possible to synthesize 1.613 / 2 = 0.8065 mol of its oxide.
Let’s calculate its weight.
To do this, multiply the amount of the substance by its molar weight.
M P2O5 = 31 x 2 + 16 x 5 = 142 grams / mol;
m P2O5 = 142 x 0.8065 = 114.523 grams;
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