ElectrolysisMedium Exam FrequencyAQA

Electrolysis of Molten Compounds

Revise Electrolysis of Molten Compounds in Electrolysis for GCSE Chemistry with 21 exam-style questions and 14 flashcards. This topic appears regularly enough that it should be part of a solid GCSE revision cycle.

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Breaking Free — The Prison Break of Ions

Introduction 2

Electrolysis Cell — Click to Explore

Diagram 3

How It Works: Ion Migration in Molten Electrolysis

How It Works 4

Example: Electrolysis of Molten Lead Bromide (PbBr₂)

Comparison 5

Key Definitions

Definitions 6

Key Facts to Memorise

Key Facts 7

Common Misconceptions

Misconceptions 8

Memory Aids

Memory Aid 9

Exam Focus

Exam Focus 10

Exam Tips for Electrolysis of Molten Compounds

Exam Tips 11

Knowledge Organiser: Electrolysis of Molten Compounds

Summary

Sample Flashcards

How do you remember that cations go to the cathode?

CATions → CAThode (both start with CAT) ANions → ANode (both start with AN) Metal at the Minus (cathode is negative), Non-metal at the Plus (anode is positive).

Why does solid lead bromide NOT conduct electricity?

In the solid state, all ions (Pb²⁺ and Br⁻) are held in fixed positions in the ionic lattice by strong electrostatic forces. They cannot move, so they cannot carry electrical charge.

Exam questions for Electrolysis of Molten Compounds

Which condition is required for electrolysis to occur with an ionic compound?

A. The ions must be free to move (molten or in solution)
B. The compound must be dissolved in organic solvent
C. The compound must be heated above 1000 °C
D. The compound must contain metallic bonds

1 markfoundation

State the products formed at each electrode when molten lead bromide (PbBr₂) is electrolysed.

2 marksstandard

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