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C4 - Chemical changes (Acids and Bases (Strong and weak acids, Reactions…

- - - - Sodium - Na
      - Lithium - Li
      - Potassium - K
      - Calcium - Ca
      - Magnesium - mg
    - - Zinc - Zn
      - Iron - Fe
      - Hydrogen - H
      - Copper - Cu
      - Carbon - C
- - - - The negative ions in the electrolyte (from the metal) will move towards the anode (positive electrode) and lose electrons (they are oxidised).
      - The positive ions in the electrolyte (from the metal) will move towards the cathode(negative electrode) and gain electrons (they are reduced).
      - As ions gain or lose electrons, they from an uncharged element and are discharged from the electrolyte
      - electrolysis of molten ionic solids form elements
        
        molten ionic liquids like lead bromide are always broken up into their elements
        
        positive metal ions reduced to the element at the cathode: pb^2+ + 2e^- -> PB
        
        Molten ionic compound can be electrolysed because because the ions can move freely and conduct electrisity
        
        Negative non-metal ions are oxidised to the element at the anode: 2Pb -> Br2 +2e^-
        
        An ionic solid can't be electrolysed because because the ions are in fixed positions and cant move.