From 200 g of technical calcium carbide, 60 liters of acetylene were obtained. What is the percentage

From 200 g of technical calcium carbide, 60 liters of acetylene were obtained. What is the percentage of pure carbide in a technical sample?

Let’s calculate the theoretical volume of acetylene.

The reaction for the synthesis of acetylene from calcium carbide is described by the following chemical reaction equation:

CaC2 + 2H2O = C2H2 + Ca (OH) 2;

From 1 mole of calcium carbide, 1 mole of acetylene is synthesized.

Let’s calculate the available chemical amount of silicon carbide substance.

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

N CaC2 = 200/64 = 3.125 mol;

The same amount of acetylene will be synthesized.

Let’s calculate its volume. To do this, multiply the amount of substance in mol by the standard volume of 1 mol of gaseous substance, which is 22.4 liters.

V C2H2 = 3.125 x 22.4 = 70 liters;

The content of pure carbide in a technical sample is 60/70 = 0.857 = 85.7%;