Calculate the volume of acetylene that can be obtained from 128 kg of calcium carbide containing 10% impurities.

Let’s execute the solution:

In accordance with the condition of the problem, we write down the equation of the process:
CaC2 + 2H2O = Ca (OH) 2 + C2H2 – hydration, acetylene was formed;

Calculations by formulas:
M (CaC2) = 64 g / mol;

M (C2H2) = 26 g / mol;

m (CaC2) = 128000 * (1 – 0.10) = 115200 g (mass without impurity).

Determine the amount of the original substance:
Y (CaC2) = m / M = 115200/64 = 1800 mol;

Y (C2H2) = 1800 mol since the amount of these compounds is 1 mol.

Find the volume of the product:
V (C2H2) = 1800 * 22.4 = 40320 l

Answer: received acetylene with a volume of 40320 l