Edexcel IGCSE Chemistry 2.23C metal extraction methods
Practise extraction-method questions by deciding from series position whether carbon can reduce an oxide or electrolysis is needed.
- Syllabus
- First assessment 2019
- Course
- Chemistry 4CH1
Exam points
- Choose carbon extraction for oxides of metals below carbon in the reactivity series.
- Explain why aluminium or sodium needs electrolysis because carbon cannot displace it.
- Use the reactivity series to justify whether heating an oxide with carbon will work.
2.23C Extraction method and reactivity question 1
[Maximum number: 3]
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.
Question (a)
(a)
Explain, using the reactivity series, why carbon can be used to extract iron from iron(III) oxide.
[ 2 ]
- carbon is above iron in the reactivity series
- carbon can remove oxygen from iron(III) oxide
Allow:
- carbon is more reactive than iron
- reverse arguments
- carbon can reduce iron(III) oxide
- carbon can displace iron from iron(III) oxide
Question (b)
(b)
Suggest why sodium was not discovered until 1807.
[ 1 ]
electricity had not been discovered
Ignore:
- electrolysis had not been discovered
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