Crude calcium carbide is made in an electric furnace by the reaction:
$C a O + 3 C \to C a C_{2} + CO$ ↑
The product contains 80% CaC₂ and 20% unreacted CaO. How much CaO (in kg) is to be added to the furnace charge for each 1.28 kg of pure CaC₂ produced?

Question

Crude calcium carbide is made in an electric furnace by the reaction:

$C a O + 3 C \to C a C_{2} + CO$ ↑

The product contains 80% CaC₂ and 20% unreacted CaO. How much CaO (in kg) is to be added to the furnace charge for each 1.28 kg of pure CaC₂ produced?

TestHub · Accepted Answer

Stoichiometry and mass balance: 1.28 kg pure CaC₂ requires 1.6 kg crude product. 20% CaO in crude means 0.32 kg unreacted CaO. Total CaO needed: 1.44 kg.

Chemistry - Metallurgy Question with Solution | TestHub

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