Redox Reactions-C6
- Created by: Shannon
- Created on: 28-05-13 11:44
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- Redox Reactions
- Rusting is a redox reaction
- A substance is reduced if it gains electrons, oxidised if it loses electrons
- Galvanising-protects iron with a layer of zinc
- Zinc is more reactive than iron
- Stops water and oxygen reaching the iron surface
- Displacement reactions: more reactive metal "swaps" places with the less reactive one
- Mg+ZnSO4 ---> MgSO4+Zn
- Zn and Mg are more reactive than iron, lose electrons- sacrifical metals
- Mg+ZnSO4 ---> MgSO4+Zn
- Redox reactions can be forced in either direction
- Iron is usually oxidised, but can be pushed back
- Rusting is a redox reaction
- Oxidation- push off electrons andturn into ions
- Chlorine is usually reduced
- Reduction- electrons forced onto less reactive metals
- Iron is usually oxidised, but can be pushed back
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