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Extraction of Aluminium

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What is the mixture of CaC2 and N2 called? how it is prepared

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Solution

Dear Student,

The mixture of CaC₂ and N₂ is called calcium cyanamide(CaCN₂).

For the preparation of this compound, carbide powder is heated at about 1000^oC in an electric furnace into which nitrogen gas is passed for several hours. The product is cooled to ambient temperatures and any unreacted carbide is leached out with water.

CaC₂+ N₂ = CaCN₂+ C

The reaction is conducted in large steel chambers. An electric carbon element heats the reactants to red heat. Nitrogen gas is pressurised at 2 atmospheres.

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