When 200 kg of calcium carbonate is decomposed, 100 kg of calcium oxide is formed, determine the product yield.

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

CaCO3 = CaO + CO2 ↑;

Find the chemical amount of calcium carbonate (limestone). To do this, we divide its weight by the mass of 1 mole of the substance.

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

N CaCO3 = 200,000 / 100 = 2,000 mol;

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

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 2,000 = 112,000 grams;

The reaction yield is 100,000 / 112,000 = 0.893 = 89.3%;