Chemistry · General Principles and Processes of Isolation of Elements
During the electrometallurgy of aluminium from purified bauxite by the Hall-Heroult process, cryolite (Na3AlF6) is added to alumina. Which of the following statements does NOT correctly describe the role of cryolite in this process?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1It acts as a solvent for dissolving alumina.
- 2It acts as a heterogeneous catalyst to speed up reduction.✓
- 3It lowers the melting point of the alumina mixture.
- 4It increases the electrical conductivity of the melt.
Correct answer
It acts as a heterogeneous catalyst to speed up reduction.
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