The mass fraction of impurities in calcium carbide is 12%. Calculate the normalized volume of acetylene

The mass fraction of impurities in calcium carbide is 12%. Calculate the normalized volume of acetylene that can be obtained from a 400 gram sample of this carbide.

Acetylene is released when calcium carbide interacts with water.

CaC2 + 2H2O = Ca (OH) 2 + C2H2 ↑;

Let’s determine the chemical amount of calcium carbide.

To do this, add up the molar weights of the elements that make up its molecule.

M CaC2 = 40 + 12 x 2 = 64 grams / mol;

N CaC2 = 400 x 0.88 / 64 = 5.5 mol;

Theoretically, the same amount of acetylene will be synthesized.

Let’s find its volume. For this purpose, we multiply the amount of the substance by the volume of 1 mole of the substance (equal to 22.4 liters).

V C2H2 = 5.5 x 22.4 = 123.2 liters;