💡 How to use this page: Understand electrolysis logic before memorising products. The rules are simple once you see the pattern.

• 🌍 Why This Matters

• ⚡ 1 — Electrolysis (4.1)

• 🔋 2 — Hydrogen–Oxygen Fuel Cells (4.2)

• 🔬 Try it — Electrochemistry Sims

• ✏️ Worked Examples

• ❌ Common Mistakes

• ❓ Question Set

• 🎥 Past Paper Walkthroughs (coming soon)

• 🎯 Revision Checklist