Calculate the volume, amount of substance and mass of gas obtained by the interaction of 128 g

Calculate the volume, amount of substance and mass of gas obtained by the interaction of 128 g of calcium carbide with water taken in excess.

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 = 128/64 = 2 mol;

Theoretically, the same 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 (which is 22.4 liters).

V C2H2 = 2 x 22.4 = 44.8 liters;

Let’s determine its weight. For this purpose, we multiply the molar amount of the substance by the weight of 1 mole of the substance.

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

m C2H2 = 2 x 26 = 52 grams;