Calculate the mass of calcium oxide and carbon dioxide that will be obtained by calcining 50 g of chalk containing calcium

Calculate the mass of calcium oxide and carbon dioxide that will be obtained by calcining 50 g of chalk containing calcium carbonate (mass fraction 95%) and non-decomposing impurities.

The thermal decomposition reaction of calcium carbonate is described by the following chemical reaction equation:

CaCO3 = CaO + CO2 ↑;

Let’s determine the chemical amount of calcium carbonate. To do this, divide its weight by the mass of 1 mole of the substance.

M CaCO3 = 40 + 12 + 16 x 3 = 100 grams / mol;

N CaCO3 = 50 x 0.95 / 100 = 0.475 mol;

The same molar amount of calcium oxide and carbon dioxide will theoretically be synthesized.

Let’s calculate the weight of carbon dioxide. To do this, we multiply the amount of the substance by the weight of 1 mole of the substance.

M CO2 = 12 + 16 x 2 = 44 grams / mol;

m CO2 = 0.475 x 44 = 20.9 grams;

Let’s calculate the mass of calcium oxide. To do this, multiply the amount of the substance by the weight of 1 mole of the substance.

M CaO = 40 + 16 = 56 grams / mol;

m CaO = 56 x 0.475 = 26.6 grams;