Reduction
Contents
Key Stage 4 Foundation
Meaning
Reduction is when a metal oxide loses one or more Oxygen atoms.
About Reduction
- Reduction takes place in displacement reactions involving metal oxides.
In the following redox reaction:
- Aluminium + Iron Oxide → Aluminium Oxide + Iron
- <chem>2Al+Fe2O3->Al2O3+2Fe</chem>
The Iron is reduced because it loses the Oxygen atoms.
Key Stage 4 Higher
Meaning
Reduction is when a positive ion in an ionic compound gains electrons.
About Reduction
- Reduction takes place in displacement reactions.
In the following redox reaction:
- Magnesium + Copper (II) Chloride → Magnesium Chloride + Copper
- Reduction of Copper: <chem>Cu^2+ + 2e^- -> Cu</chem>
The Copper is reduced because it gains electrons.
References
AQA
- Reduction page 130, GCSE Combined Science; The Revision Guide, CGP, AQA
- Reduction, pages 137-140, GCSE Combined Science Trilogy; Chemistry, CGP, AQA
- Reduction, pages 162-165, 190, 191, GCSE Chemistry, CGP, AQA
- Reduction, pages 56-58, 65, GCSE Chemistry; The Revision Guide, CGP, AQA
- Reduction, pages 87, 89, 91, 104-105, GCSE Chemistry; Third Edition, Oxford University Press, AQA
- Reduction; gain of electrons, pages 138-9, 155, 157, 159, 161, 164-5, 182, GCSE Chemistry; Student Book, Collins, AQA
- Reduction; removal of oxygen, pages 131-3, 136-7, GCSE Chemistry; Student Book, Collins, AQA
Edexcel
- Reduction, pages 110, 114, 116, 117, GCSE Combined Science; The Revision Guide, CGP, Edexcel
- Reduction, pages 146, 147, 153, 216, GCSE Chemistry, CGP, Edexcel
- Reduction, pages 48, 52, 54, 55, GCSE Chemistry; The Revision Guide, CGP, Edexcel
- Reduction, pages 66, 81, 87, 90-91, GCSE Chemistry, Pearson, Edexcel
- Reduction; metal extraction, page 90, GCSE Chemistry, Pearson, Edexcel
- Reduction; OILRIG mnemonic, pages 66, 81, 133, GCSE Chemistry, Pearson, Edexcel