Question detail
Explain why aluminium oxide is used in the extraction of aluminium through electrolysis.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Electrolysis
Question
Explain why aluminium oxide is used in the extraction of aluminium through electrolysis.
Answer
Aluminium oxide is used because it contains aluminium ions that can be reduced to form aluminium metal at the cathode. Additionally, it is a stable compound that can be electrolyzed to produce the desired metal.
Explanation
This answer is strong as it addresses the role of aluminium oxide in the electrolysis process and its significance in producing aluminium. The question assesses the understanding of the extraction process and the properties of the compound used.
Common mistake
Confusing Oxide Ion Behavior
Students often state that oxide ions gain electrons at the anode instead of losing them.
Remember that oxidation occurs at the anode, where negative ions like oxide lose electrons to form oxygen.
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