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Grade 11Physical Chemistry

Crude calcium carbide is made in an electric furnace by the following reaction:- CaO + 3C gives CaC₂ + CO
The product contains 85 percent CaC₂ and 15percent unreacted CaO.
Q1.How much pure CaO is to be added to the furnce charge for each 1000 kg of CaC₂(pure) produced?

How much CaO is to be added to the furnace charge for each 1000 kg of crude product?

Abhinav Acharya

12 Years agoGrade 11

1 Answer

Sumit Majumdar

12 Years ago

Dear student,

By equating the mole fraction for CaC₂, we get:

$\frac{\frac{1000\times 1000}{64.0994}}{\frac{1000\times 1000}{64.0994}+\frac{y}{56.0774}}=\frac{85}{100}$

This gives that mass of CaO should be 154 kg.

Regards

Sumit

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