Electrolysis C2

General
1. electrolysis: splitting up with electricty
2. liquid
  1. to conduct electricity
  2. electrolyte
Cathode
1. negative
2. gives out electrons
  1. reduction reaction
    1. gain of electrons
  2. +ve ions attracted here
Anode
1. takes in electrons
2. positive
3. oxidation
  1. loss of electrons
Sodium Chloride
1. dissolved in water
2. hydrogen, chlorine, sodium hydroxide
3. Hydrogen gains an electron at the cathode
4. Chlorine is produced at the anode
  1. Chloride is an anion
5. sodium remains in solution
  1. more reactive than hydrogen
    1. Cation (ion)
  2. NaOH left
Lead Bromide
1. Lead at cathode
2. Bromine at anode
3. Molten
Extracting Aluminium
1. from Bauxite ore
2. has a high melting point (2000C)
  1. very expensive
  2. so is dissolved in Cryolite
    1. brings temp. down to 900C
      1. easier and cheaper
3. Carbon electrodes
  1. conduct electricity
  2. Aluminium at cathode
  3. Oxygen at anode
    1. reacts with Carbon anode
      1. Carbon Dioxide
        replace anodes

Zusammenfassung der Ressource

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