This exam focus covers Exam Focus within Electrolysis of Molten Compounds for GCSE Chemistry. Revise Electrolysis of Molten Compounds in Electrolysis for GCSE Chemistry with 20 exam-style questions and 0 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 9 of 11 in this topic. Treat this as a marking guide for what examiners are looking for, not just a fact list.
Topic position
Section 9 of 11
Practice
20 questions
Recall
0 flashcards
🎯 Exam Focus
Frequently Examined
Molten electrolysis is examined with both written explanations and half equations. Key areas:
- Predicting products — state the metal at cathode and non-metal at anode with justification
- Explaining WHY ions move — always use the word "attracted" and refer to opposite charges
- Writing half equations — must balance atoms AND charges; include electrons
- Explaining conductivity — solid does not conduct because ions cannot move; molten does conduct because ions are free
- Identifying oxidation and reduction — which electrode, which type of ion, which process
→ See also: Required Practical: Electrolysis of Aqueous Solutions — extends these principles to aqueous solutions with competing ions.
Quick Check: What products form when molten sodium chloride (NaCl) is electrolysed? Write a half equation for the cathode.
Sodium metal (Na) forms at the cathode, and chlorine gas (Cl₂) forms at the anode. Cathode half equation: Na⁺ + e⁻ → Na. (Sodium ions gain one electron each and are reduced to sodium metal.)