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C5 (Electrolysis, Ions present in electrolyte, Discharge of Ions) - Coggle…

- - - - Not a lot of ions to conduct electricity
  - - - Negative electrode (attracts cations)
      - Metal and hydrogen cations attracted
        
        Cations gain electrons to produce metals or hydrogen gas
    - - Positive electrode (Attracts anions)
      - Non-metal anions get attracted
        
        If anode is inert (Carbon/platinum) anions will lose electrons to anode
        
        If anode is reactive (zinc, copper, etc.) Metal atoms of anode itself will lose electrons to form ions
- - - - Ions come from substance AND water
        
        E.g. Aqueous NaCl = Na+, Cl-, H+, OH-
      - Can be carried out on solutions
        
        dissolved ions are free to move in mixture
    - - Ions come from substance only
        
        E.g. Molten NaCl = Na+, Cl-
      - Can only happen if ions are free to move to electrode attracted to
        
        For ionic compounds this can only happen when molten or in solution.
        
        can be used to obtain pure metals from compound/ore