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Edexcel IGCSE Chemistry 1 56c Ionic Compounds and Conductivity Questions

Practise explaining conductivity in ionic substances by linking solid lattices, molten salts and aqueous solutions to mobile ions.

Syllabus
First assessment 2019
Course
Chemistry 4CH1

Exam points

  • explain why solid lead(II) bromide or sodium chloride does not conduct using fixed ions
  • link molten or aqueous ionic compounds to conduction by mobile ions, not electrons

Edexcel IGCSE Chemistry 1 56c Ionic Compounds and Conductivity Questions question 1

[Maximum number: 2]

Iron metal was discovered several thousand years ago. Iron is produced industrially from iron(III) oxide by extraction using carbon.

Sodium is a metal in Group 1 of the Periodic Table. Sodium was discovered by Sir Humphrey Davy in 1807. It is produced industrially by the electrolysis of sodium chloride.

The diagram shows a simplified version of the Downs cell, which can be used to produce sodium industrially. The electrolyte is molten sodium chloride.

Figure for Question Edexcel IGCSE Chemistry 1 56c Ionic Compounds and Conductivity Questions question 1 — Edexcel IGCSE Chemistry

Explain why the molten electrolyte conducts electricity.

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