Electrolysis: Chemical Changes: Chemistry: GCSE (9:1)

• Cathode

  Electrode at which reduction occurs

  
• Anode


  Electrode at which oxidation occurs

  
• Electrode


  A device for conducting electricity into the liquid
• Cation

  A positively charged ion
• Anion


  A negatively charged ion
• Electrolyte


  An ionic compound able to conduct an electric current

  
• Reason solid ionic substance can't conduct electricity

  Ions are in fixed positions

  
• Reason molten/dissolved ionic substances can conduct electricity

  Ions are free to move and carry charge

  
• In electrolysis ions go to

  Opposite charge electrode

  
• Positive ions go to

  Cathode

  
• Negative ions go to

  Anode

  
• Discharged


  Remove an electric charge by adding/removing electrons
• Oxidation in terms of electrons

  Loss of electrons
• Reduction in terms of electrons

  Gain of electrons
• When a molten compound is electrolysed the metal forms


  at the cathode
• When a molten compound is electrolysed the non metal forms


  at the anode