To obtain acetylene, 100 g of technical calcium carbide containing 20% impurities was “dissolved”

To obtain acetylene, 100 g of technical calcium carbide containing 20% impurities was “dissolved” in water. Calculate the volume of acetylene released in this reaction.

Acetylene is synthesized by the interaction of calcium carbide with water.

CaC2 + 2H2O = Ca (OH) 2 + C2H2 ↑;

Let’s calculate the molar amount of calcium carbide.

For this purpose, let us sum up the molar weights of the elements that make up this molecule.

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

N CaC2 = 100/64 = 1.5625 mol;

Theoretically, the same molar amount of acetylene will be obtained.

Let’s calculate its volume. To do this, multiply the amount of the substance by the volume of 1 mole of the substance (equal to 22.4 liters).

V C2H2 = 1.5625 x 22.4 = 35 liters;