1. Atom oxidized: Cu, Atom reduced: Ag
Oxidation half-reaction: Cu → Cu²⁺ + 2e⁻
Reduction half-reaction: Ag⁺ + e⁻ → Ag (multiply by 2: 2Ag⁺ + 2e⁻ → 2Ag)
Balanced equation: Cu + 2Ag⁺ → Cu²⁺ + 2Ag
2. Atom oxidized: Br, Atom reduced: Cl
Oxidation half-reaction: 2Br⁻ → Br₂ + 2e⁻
Reduction half-reaction: Cl₂ + 2e⁻ → 2Cl⁻
Balanced equation: Cl₂ + 2Br⁻ → 2Cl⁻ + Br₂
3. Atom oxidized: I, Atom reduced: F
Oxidation half-reaction: 2I⁻ → I₂ + 2e⁻
Reduction half-reaction: F₂ + 2e⁻ → 2F⁻
Balanced equation: 2I⁻ + F₂ → 2F⁻ + I₂
4. Atom oxidized: Sn, Atom reduced: Fe
Oxidation half-reaction: Sn²⁺ → Sn⁴⁺ + 2e⁻
Reduction half-reaction: Fe³⁺ + e⁻ → Fe²⁺ (multiply by 2: 2Fe³⁺ + 2e⁻ → 2Fe²⁺)
Balanced equation: Sn²⁺ + 2Fe³⁺ → Sn⁴⁺ + 2Fe²⁺
5. Atom oxidized: Mg, Atom reduced: H
Oxidation half-reaction: Mg → Mg²⁺ + 2e⁻
Reduction half-reaction: 2H⁺ + 2e⁻ → H₂
Balanced equation: Mg + 2HCl → MgCl₂ + H₂
Parent Tip: Review the logic above to help your child master the concept of redox worksheet.
