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The rules of how to calculate oxidation states
(if you haven't learnt this, see powerpoint
`oxidation states')
That oxidation is loss of electrons, and
reduction is gain of electrons
During each reaction, the overall oxidation
states are 0…read more

Slide 3

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Redox Reactions
We need to know how to find out what elements
have been oxidised and which ones have been
reduced. There are a few steps for doing this:
1. Find out and write down the oxidation states of
all elements on both sides
2. Observe which elements have changed
oxidation state e.g -1 to -4
3. Work out whether they've been reduced or
4. Remember that one element can be both
reduced and oxidised in one reaction! This is
called disproportionation
5. Also remember that in a reaction, if something is
oxidised, something also has to be reduced…read more

Slide 4

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Write in the oxidation states
See which elements have been reduced and oxidised
n…read more

Slide 5

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More Examples
Redox…read more


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