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Electrolysis - Coggle Diagram

- - - - Al3+ cations are attracted
      - Reduced (gain electrons)
      - Formed aliminium
    - - O2- anions attracted
      - O2 reacts with graphite anode to form CO2
      - Oxidised (lost electrons)
- - - - Charge of +1
      - e.g Na+
    - - Charge of 2+
      - e.g Mg2+
    - - Charge of 3+
      - e.g Al3+
    - - ?
    - - Charge of 3-
      - e.g N3-
    - - Charge of 2-
      - O2-
    - - Charge of -
      - Cl-
  - - - Lead
    - - Zinc
  - - - hydrogen
    - - oxygen
    - - chlorine
    - - bromine
- - - - Positive ions are attracted and reduced (gain of electrons)
      - Metal is formed
    - - Negative ions are attracted and oxidised
      - Non metal is formed
  - - - Anode
        
        METAL or HYDROGEN formed
        
        Metal formed if it is less reactive than hydrogen
        
        Copper
        
        Silver
        
        Gold
        
        Otherwise hydrogen is formed
      - Cathode
        
        NON METAL or OXYGEN formed
        
        Non metal formed if halide ions are present
        
        Cl-
        
        Br-
        
        I-
        
        Otherwise oxygen is formed
      - Simplified rules:
        
        Cathode:
        
        Cl-, Br- or I- formed. If none of these then oxygen formed
        
        Anode
        
        Au, Cu or Ag formed. if none of these then hydrogen formed
    - - H+ ions
      - OH- ions
      - Complicates things as ionic compounds splits into metal cation and non metal anion AND water splits into hydrogen cation and hydroxide anion