# During the electrolysis of molten lead(II) bromide, describe what happens at each electrode and identify the product formed at each electrode.

> Cambridge International IGCSE Chemistry (0620) — 4.1 Electrolysis · Describe · 4 marks

## Mark scheme (4 marks)

1. At the cathode (negative electrode), lead ions / Pb²⁺ ions are attracted and gain electrons / are reduced, forming lead metal
2. Lead (metal / liquid) is the product at the cathode
3. At the anode (positive electrode), bromide ions / Br⁻ ions are attracted and lose electrons / are oxidised, forming bromine
4. Bromine (gas / liquid / vapour) is the product at the anode

## Key terms

- [electrolysis](https://www.gradenine.co.uk/glossary/electrolysis)
- [molten](https://www.gradenine.co.uk/glossary/molten)

## Related

- [Revision notes for Cambridge International IGCSE Chemistry (0620)](https://www.gradenine.co.uk/learn)
- [How to answer "Describe" questions](https://www.gradenine.co.uk/tools/command-word-cheatsheet)
- [Practice this with AI marking (free)](https://www.gradenine.co.uk/start)

---
Source: [GradeNine](https://www.gradenine.co.uk/q/during-the-electrolysis-of-molten-lead-ii-2505e4f0) · Published by Druglandscape Ltd.