Question detail
What is the half equation for the reduction of aluminium ions (Al³⁺) at the cathode during 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
What is the half equation for the reduction of aluminium ions (Al³⁺) at the cathode during electrolysis?
Answer
The half equation for the reduction of aluminium ions at the cathode is Al³⁺ + 3e⁻ → Al.
Explanation
This question tests the student's understanding of half equations in electrolysis, specifically focusing on the reduction process at the cathode. It requires knowledge of the charge of aluminium ions and the electron transfer involved in the reaction.
Common mistake
Common Mistake in Writing Half Equations
Students often confuse the direction of electron flow and incorrectly write half equations for the cathode, sometimes placing electrons on the wrong side.
Remember that reduction occurs at the cathode, meaning positive ions gain electrons. Always place electrons on the left side of the equation when writing half equations for the cathode.
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