Anhydrous Aluminum Oxide Is Dissolved in Molten Cryolite Rather Than

question 55

Multiple Choice

Anhydrous aluminum oxide is dissolved in molten cryolite rather than simply melted because
__________

• A) the cryolite provides a source of sodium ions.
• B) the melting point of pure, anhydrous aluminum oxide is too high.
• C) the cryolite provides the necessary fluoride ions.
• D) the cryolite actually provides the aluminum that is to be reduced.
• E) in pure, molten Al₂O₃, the aluminum would be oxidized rather than reduced.

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