The Mineral Cryolite, Na₃AlF₆, Is Used in the Hall Process

question 41

Multiple Choice

The mineral cryolite, Na₃AlF₆, is used in the Hall process for aluminum production as

• A) the source of aluminum (the ore).
• B) a chemical reducing agent.
• C) a material that forms a slag and thus removes impurities.
• D) a solvent for alumina, Al₂O₃.

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