GCSE revision (WW)

4

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Silver

Gold

aluminium

direct

decomposition

below

above

1

Write balanced, ionic equations to show the electrode reactions which occur when copper is purified. 
At the anode (where ______________  takes place) (Impure copper)
Cu → Cu²⁺ + 2e⁻ 
At the cathode (Where ______________  takes place) (pure copper)
Cu²⁺ + 2e⁻ → Cu 
https://www.focuselearning.co.uk/s/1jstzoplah30 Focus education simulation. 

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oxidation

reduction

6

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solid

ions

molten

electrons

Graphite

reduction

oxidation

5

The term is used to describe a reaction which gives out heat is _______________ .
When drops of water are added to anhydrous copper sulphate heat is given out _______________ and the solid turns _________ 
The anhydrous copper sulphate can be heated to remove the water of hydration so this reaction is an example of a _______________  reaction. https://www.focuselearning.co.uk/s/4wyjvlrqy7sj
The forward and reverse reactions are not, however, both occurring at the same rate so this is not an example of ____________  equilibrium. https://www.focuselearning.co.uk/s/40aaubdwqxw0

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blue

dynamic

Exothermic

reversible

GCSE revision (WW)

a) Define what is meant by the term electrolysis.

b) Name one metal which is obtained from its ore by electrolysis.

a) Define what is meant by the term electrolysis.

b) Name one metal which is obtained from its ore by electrolysis.