1.

For each of the substance listed below, describe the role played in the extraction of aluminium: 1. Cryolite 2. Sodium hydroxide 3. Graphite.

Answer»

1. Cryolite: To reduce the melting point of Alumina and increase the conductivity of solution.

2. Sodium hydroxide: for purification of bauxite ore as a leaching agent.

3. Graphite: As anode and make the reduction of Al2O3 easier.



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