Fused Bauxite is electrolyzed to get _?
Correct answer: C. Aluminum
- A. Sodium
- B. Magnesium
- C. Aluminum
- D. Iron
Explanation
Fused bauxite, which is a mixture of aluminum oxide (Al2O3), iron oxide (Fe2O3), and other impurities, is electrolyzed to produce pure aluminum metal in a process called the Hall-Héroult process. In this process, fused bauxite is dissolved in a molten cryolite (Na3AlF6) electrolyte, which lowers the melting point of the mixture and makes it more conductive. Carbon anodes are used to supply electrons to the system, and the aluminum ions produced at the cathode are reduced to form liquid aluminum metal, which accumulates at the bottom of the cell. Oxygen gas is produced at the anode, where it reacts with the carbon anode to form carbon dioxide.
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