ELECTROLYSIS HALF EQUATIONS ⚡️ (all of them for each one)

Aluminium extraction — cathode

Al³⁺ + 3e⁻ → Al

Aluminium extraction — anode

2O²⁻ → O₂ + 4e⁻

Brine electrolysis — cathode

2H⁺ + 2e⁻ → H₂

Brine electrolysis — anode

2Cl⁻ → Cl₂ + 2e⁻

Copper purification — cathode

Cu²⁺ + 2e⁻ → Cu

Copper purification — anode

Cu → Cu²⁺ + 2e⁻

Aqueous solution without halide — cathode

2H⁺ + 2e⁻ → H₂

Aqueous solution without halide — anode

4OH⁻ → O₂ + 2H₂O + 4e⁻

Bromide solution — anode

2Br⁻ → Br₂ + 2e⁻

Iodide solution — anode

2I⁻ → I₂ + 2e⁻