Answer the following questions with respect to the electrolytic process in the extraction of aluminium:
Identify the components of the electrolyte other than pure alumina and the role played by each.

Explanation

The electrolyte is a solution of aluminium oxide `(Al_2O_3)` dissolved in cryolite (sodium hexafluoroaluminate(III), `Na_3AlF_6`). The use of cryolite reduces the melting point of alumina and fluorspar increases the conductivity of solution.