Electrolysis In Depth

In depth mindmap of electrolysis but no half equations. 

hope you find this useful

Abdullah

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  • Electrolysis
    • Electrodes
      • Positive electrode- anode
        • Negative ions are attracted to the anode, these are called anions
      • Negative electrode- cathode
        • Positive ions are attracted to the cathode, these are called cations
      • P.A.N.I.C- Positive Anode, Negative Is Cathode
    • Electrolysis can only work in molten or liquid compounds because current cannot pass through solid ionic compounds
    • Electrolysis of Lead Bromide
      • Lead Bromide solution is the electrolyte
      • The lead ions are attracted to the cathode
      • The bromide ions are attracted to the anode
        • Bromide gas is given off
    • Electrolysis of Brine
      • Brine is concentrated sodium chloride solution
      • Sodium Hydroxide, chlorine and hydrogen gas are products of this
        • The sodium hydroxide is used as bleach for cleaning
        • Chlorine is used to kill bacteria in pools
        • Hydrogen is used as fuel
      • The sodium is more reactive than the hydrogen
        • The positive hydrogen ions move to the cathode
        • The sodium stays in the electrolyte and becomes sodium hydroxide
      • The Chlorine ions move to the anode and chlorine gas is produced
    • Redox Reactions
      • When an ion gains electrons it is reduced
      • When an ion loses electrons, it is oxidised
    • Electroplating
      • The negative electrode is made of the object to be electroplated
      • The positive electrode is made of the metal to coat the object with
      • The electrolyte is the solution of the coating metal
    • Extraction of Aluminium
      • Aluminium ore is known as bauxite
        • We extract aluminium oxide from bauxite and purify it
      • Aluminium oxide's boiling point is too high so we dissolve it in molten cryolite to lower it
        • Electrolysis of Aluminium oxide
          • The electrodes are made up of graphite
            • The anodes need to be replaced regularly
          • Aluminium forms at the cathode and it is tapped off
          • The oxygen produced becomes carbon dioxide and burns away the anodes
        • This makes it cheaper

Comments

vojohnny

This is fantastic resource, thanks bro

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