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Sort each half-reaction as Oxidation or Reduction.

Exercise and reference answers

Left
Oxidation
Items
  1. Item
    Zn → Zn²⁺ + 2e⁻
    Answer
    Oxidation
  2. Item
    Fe²⁺ → Fe³⁺ + e⁻
    Answer
    Oxidation
  3. Item
    Na → Na⁺ + e⁻
    Answer
    Oxidation
  4. Item
    Cu²⁺ + 2e⁻ → Cu
    Answer
    Reduction
  5. Item
    Cl₂ + 2e⁻ → 2Cl⁻
    Answer
    Reduction
  6. Item
    Ag⁺ + e⁻ → Ag
    Answer
    Reduction
Right
Reduction
Instructions
Oxidation = loss of e⁻, Reduction = gain of e⁻.

Explanation

_Source: syllabus Chemistry, Ch 8 'Redox Reactions' §8.2_
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