What mass of calcium oxide can be obtained from 250 kg of limestone, in which the mass fraction of impurities is 0.2.
May 29, 2021 | education
| 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 = 250,000 x 0.8 / 100 = 2,000 mol;
During the reaction, the same amount of calcium oxide will be synthesized.
N CaO = 2000 mol;
Its weight will be:
M CaO = 40 + 16 = 56 grams / mol;
m CaO = 56 x 2,000 = 112,000 grams = 112 kg;
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