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Slide 2

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

Slide 5

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More Examples
No
Redox…read more

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