The decomposition of 200 g of calcium carbonate yields 100 g of calcium oxide.

The decomposition of 200 g of calcium carbonate yields 100 g of calcium oxide. Determine the product yield as a percentage of theoretical.

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, 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 = 200/100 = 2 mol;

The same molar amounts of calcium oxide and carbon dioxide can theoretically be obtained.

Let’s calculate the weight of calcium oxide. To do this, we 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 = 112 grams;

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