Learning objective

(HT only) Write half equations for aluminium ion reduction and oxide ion oxidation when formulae and charges are supplied.

Read the explanation, check the common trap, then practise with flashcards and questions.

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At a glance

Flashcards

Questions

Topic

Electrolysis

Subtopic

Using electrolysis to extract metals

AQA GCSE ChemistryChemical changes

Study support

Understand this objective

Short explanation

(HT only) Write half equations for aluminium ion reduction and oxide ion oxidation when formulae and charges are supplied. This objective belongs to Using electrolysis to extract metals within Electrolysis for AQA GCSE Chemistry 8462. A strong answer should use aluminium accurately, explain the chemistry behind the statement, and connect the idea back to the exact command in the objective. When revising, separate this point from neighbouring Chemistry ideas by naming the relevant particle, substance, process, calculation, observation, or structure before giving the final conclusion.

Key concepts

Aluminium ion reductionOxide ion oxidation

Why it matters

This objective helps connect Using electrolysis to extract metals to exam-style questions, flashcards, and revision notes for Electrolysis.

Common mistakes

1 linked

Common Mistake in Half Equations: To fix this, students should carefully review the charges of the ions involved: aluminium ions (Al^3+) gain three electrons to become aluminium (Al), while oxide ions (O^2-) lose two electrons to become oxygen (O2).

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