The decomposition of 20 g of calcium carbonate yields 10 g of calcium oxide. What is the mass fraction

The decomposition of 20 g of calcium carbonate yields 10 g of calcium oxide. What is the mass fraction of the product yield from the theoretically possible percentage?

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

CaCO3 = CaO + CO2 ↑;

Let’s calculate 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 = 20,000 / 100 = 200 mol;

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

Find 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 200 = 11 200 grams;

The reaction yield is 10,000 / 11,200 = 0.893 = 89.3%;