electrolysis

• Electrolysis


  Separating a ionic compounds using electricity
• anion


  negatively charged ion
• anode


  positive electrode
• cation


  positively charged ion
• cathode


  negative electrode
• electrolyte


  a liquid that is a good conductor of electricity. (usually contains ions)
• molten


  melted
• Redox


  reaction where reduction and oxidation take place
• ore


  rock that contains high concentration of metal compound
• oxidation


  gaining oxygen OR losing electrons
• reduction


  losing oxygen OR gaining electrons
• electrode


  conducting rod made of metal or graphite that carries the current in/out of the electrolyte
• solution


  an ionic solid dissolved in water
• metal


  product formed at the negative electrode (cathode)
• non-metal


  product formed at the positive electrode (anode)
• Reason solid ionic compounds cannot conduct


  The ions have a fixed position and cannot move
• Reason molten substances can conduct


  The ions are free to move
• Equation to show what happens at cathode


  Mg2+ + 2e- -> Mg
• Equation to show what happens at anode


  2Cl- -> Cl2 + 2e-
• Products of the electrolysis of molten sodium chloride

  sodium and chlorine
• Products of the electrolysis of molten lead bromide

  lead and bromine
• Products of electrolysis of molten aluminium oxide

  aluminium and oxygen