What mass of phosphoric acid can be obtained from 248 kg of phosphorus

What mass of phosphoric acid can be obtained from 248 kg of phosphorus if the mass fraction of the acid yield is 85%?

Let’s calculate the chemical amount of a substance in phosphorus weighing 248 kilograms.

M P = 31 grams / mol;

N P = 248,000/31 = 8,000 mol;

The phosphoric acid molecule contains one phosphorus atom, therefore, taking into account the yield of 85%, 8,000 x 0.85 = 6,800 mol of acid can be obtained.

Let’s calculate its weight.

To do this, we multiply the amount of the substance by its molar weight.

M H3PO4 = 3 + 31 + 16 x 4 = 98 grams / mol;

m Н3РО4 = 6 800 x 98 = 666 400 grams = 666.4 kg.