When decomposing limestone with a mass of 1 ton, we obtain carbon dioxide V = 201.6.
September 29, 2021 | education
| When decomposing limestone with a mass of 1 ton, we obtain carbon dioxide V = 201.6. what is the mass fraction of calcium carbonate in this limestone?
The decomposition reaction of calcium carbonate when heated is described by the following chemical equation:
CaCO3 = CaO + CO2 ↑;
Let’s calculate the chemical amount of carbon dioxide. To do this, we divide its volume by the volume of 1 mole of the substance.
N CO2 = 201,600 / 22.4 = 9,000 mol;
The same molar amount of calcium carbonate was decomposed.
Let’s calculate its weight:
M CaCO3 = 40 + 12 + 16 x 3 = 100 grams / mol;
m CaCO3 = 100 x 9000 = 900 kg;
Mass fraction of calcium carbonate is:
K = 900/1000 = 0.9 = 90%;
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