Chemistry - Redox Reactions - Balancing redox equations - Balance These Redox Equations

5 redox equations to balance using the half-reaction method (acidic solution). Q1: 'Zn + Cu²⁺ → Zn²⁺ + Cu. Balanced: ___ Zn + ___ Cu²⁺ → ___ Zn²⁺ + ___ Cu' (1,1,1,1 - already balanced). Q2: 'Fe + O₂ → Fe₂O₃ (balance fully): ___ Fe + ___ O₂ → ___ Fe₂O₃' (4, 3, 2). Q3: 'Cr₂O₇²⁻ + Fe²⁺ → Cr³⁺ + Fe³⁺ (a