Difference between revisions of "Oxidation"
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| + | ==Key Stage 4 Foundation== | ||
| + | ===Meaning=== | ||
| + | '''Oxidation''' is when a [[metal]] gains one or more [[Oxygen]] [[atom]]s to become a [[Metal Oxide|metal oxide]]. | ||
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| + | ===About Oxidation=== | ||
| + | : [[Oxidation]] takes place in [[Displacement Reaction|displacement reactions]] involving [[Metal Oxide|metal oxides]]. | ||
| + | In the following '''redox reaction''': | ||
| + | : [[Aluminium]] + [[Iron Oxide]] → [[Aluminium Oxide]] + [[Iron]] | ||
| + | : <chem>2Al+Fe2O3->Al2O3+2Fe</chem> | ||
| + | The [[Aluminium]] is [[Oxidation|oxidised]] because it gains the [[Oxygen]] [[atom]]s. | ||
| + | |||
| + | ==Key Stage 4 Higher== | ||
| + | ===Meaning=== | ||
| + | '''Oxidation''' is when a [[metal]] loses [[electron]]s to become a [[Positive Ion|positive ion]]. | ||
| + | |||
| + | ===About Oxidation=== | ||
| + | : '''Oxidation''' takes place in [[Displacement Reaction|displacement reactions]]. | ||
| + | In the following '''redox reaction''': | ||
| + | : [[Magnesium]] + [[Copper II Chloride]] → [[Magnesium Chloride]] + [[Copper]] | ||
| + | : [[Oxidation]] of [[Magnesium]]: <chem>Mg - 2e^- -> Mg^2+</chem> | ||
| + | The [[Magnesium]] is [[Reduction|reduced]] because it loses [[electron]]s. | ||
Revision as of 12:24, 14 January 2019
Contents
Key Stage 3
Meaning
Oxidation is a chemical reaction in which a substance gains Oxygen.
About Oxidation
- Oxidation can happen very slowly at low temperatures.
- Both Metals and Non-metals can be oxidised.
- Metal Oxides are basic, while Non-metal Oxides are acidic when dissolved in water.
- When Iron is oxidised it is said to be rusting.
Examples
| Rusting | Burning |
 |
 |
| Iron + Oxygen → Iron Oxide | Magnesium + Oxygen → Magnesium Oxide |
Key Stage 4 Foundation
Meaning
Oxidation is when a metal gains one or more Oxygen atoms to become a metal oxide.
About Oxidation
- Oxidation 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 Aluminium is oxidised because it gains the Oxygen atoms.
Key Stage 4 Higher
Meaning
Oxidation is when a metal loses electrons to become a positive ion.
About Oxidation
- Oxidation takes place in displacement reactions.
In the following redox reaction:
- Magnesium + Copper II Chloride → Magnesium Chloride + Copper
- Oxidation of Magnesium: <chem>Mg - 2e^- -> Mg^2+</chem>