To obtain acetylene, 100 g of technical calcium carbide containing 20% impurities was “dissolved”
June 15, 2021 | education
| 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;
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