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4000844
Electrolysis
Description
AQA GCSE Chemistry Unit 2: Electrolysis
No tags specified
electrolysis
lead bromine
sodium chloride
aluminium
science
gcse
Mind Map by
acrombie
, updated more than 1 year ago
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Created by
jroach8989
almost 9 years ago
Copied by
acrombie
almost 9 years ago
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Resource summary
Electrolysis
Lead Brodmide
Positive Electrode
Oxidation
Bromine produced
2Br- 2e- ----> Br2
Negative Electrode
Reduction
Lead Produced
Pb2+ +2e- ----> Pb
Must be molten
Sodium Chloride Solution
Positive electrode
Oxidation
Chlorine
Bleach products
2Cl- -2e- ----> 2Cl
Negative electrode
Reduction
Hydrogen
Fuel for cars
2H+ + 2e- ----> H2
Sodium Hydroxide
More reactive sodium and hydrogen ions left behind
Sodium Hydroxide left in solution
Aluminum
Crycolite
Lower temperature and costs
Bauxite
Aluminium Compound
Mined and purified to white powder
Aluminium Oxide
Negative Electode
Aluminium
Al3+ +3e- ---->Al
Positive Electrode
Oxygen
Reacts with carbon in electrode
Carbon Dioxide
2O2- -4e- ----> O2
OIL RIG
Oxidation Is Loss
Reduction Is Gain
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