Question detail
Write the word equation for the electrolysis of molten aluminium oxide.
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
Write the word equation for the electrolysis of molten aluminium oxide.
Answer
Aluminium oxide decomposes to form aluminium and oxygen: Aluminium oxide → Aluminium + Oxygen.
Explanation
This question tests the student's understanding of the products formed during the electrolysis of aluminium oxide, a key concept in metal extraction. The answer demonstrates knowledge of the decomposition reaction involved.
Common mistake
Misidentifying the anode product
Students often write that aluminium is produced at the anode during aluminium extraction.
Explain that aluminium ions are reduced at the cathode to give aluminium metal, while oxide ions are oxidised at the anode to give oxygen gas.
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