When calcining limestone, two valuable products are obtained – quicklime CaO and carbon dioxide.

When calcining limestone, two valuable products are obtained – quicklime CaO and carbon dioxide. Both substances are used in the sugar industry. We calculated the mass of both oxides if the mass of limestone is 100 kg.

The decomposition reaction of limestone is described by the following chemical reaction equation:

CaCO3 = CaO + CO2;

When 1 mol of limestone is decomposed, 1 mol of gaseous carbon dioxide is synthesized.

This also synthesizes 1 mol of calcium oxide

Let’s calculate the available chemical amount of calcium carbonate substance.

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

N CaCO3 = 100,000 / 100 = 1,000 mol;

During the reaction, the same amount of calcium oxide will be synthesized.

N CaO = 1,000 mol;

Its weight will be:

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

m CaO = 56 x 1,000 = 56 kg;

The weight of carbon dioxide will be 100 – 56 = 44 kg.