ConceptConceptDocsDocuments

Edexcel IGCSE Chemistry 1.56C Ionic compounds & conductivity

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

1.56C Ionic compounds and conductivity 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 1.56C Ionic compounds and conductivity question 1 — Edexcel IGCSE Chemistry

Explain why the molten electrolyte conducts electricity.

All question bank results loaded