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1721368
Electrolysis C2
Description
Mind Map on Electrolysis C2, created by miriam.turner on 28/11/2014.
Mind Map by
miriam.turner
, updated more than 1 year ago
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Created by
miriam.turner
over 9 years ago
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Resource summary
Electrolysis C2
General
electrolysis: splitting up with electricty
liquid
to conduct electricity
electrolyte
Cathode
negative
gives out electrons
reduction reaction
gain of electrons
+ve ions attracted here
Anode
takes in electrons
positive
oxidation
loss of electrons
Sodium Chloride
dissolved in water
hydrogen, chlorine, sodium hydroxide
Hydrogen gains an electron at the cathode
Chlorine is produced at the anode
Chloride is an anion
sodium remains in solution
more reactive than hydrogen
Cation (ion)
NaOH left
Lead Bromide
Lead at cathode
Bromine at anode
Molten
Extracting Aluminium
from Bauxite ore
has a high melting point (2000C)
very expensive
so is dissolved in Cryolite
brings temp. down to 900C
easier and cheaper
Carbon electrodes
conduct electricity
Aluminium at cathode
Oxygen at anode
reacts with Carbon anode
Carbon Dioxide
replace anodes
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