What mass of calcium carbide with a content of 15% of impurities is required in order to obtain acetylene with a mass of 2.6 kg?

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 acetylene substance.

M C2H2 = 12 x 2 + 1 x 2 = 26 grams / mol;

N C2H2 = 2600/26 = 100 mol;

Taking into account the impurity content of 15% of the yield for this reaction, it is necessary to take 100 / 0.85 = 117.65 mol of silicon carbide.

Let’s calculate its weight.

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

m CaC2 = 117.65 x 64 = 7 529 grams = 7.53 kg;