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Electrochemistry - Coggle Diagram

- - - - Electrolysis of an acid always only produces gases, so a Hoffman Voltameter is used. It is comprised of two inverted burettes to collect gas with platinum electrodes at which electrolysis can occur
      - Anode: 4OH-(aq) --> 2H2O(l) + O2(g) + 4e-
      - Cathode: 2H+ + 2e- --> H2(g)
    - - Anode: 2Cl-(aq) --> Cl2(g) + 2e-
      - Cathode: 2H+(aq) + 2e- --> H2(g)
      - If a dilute solution were used, oxygen would be the main product at the anode
      - Even though equal amounts of the two gases are produced, much of the chlorine dissolves back into the water
    - - Anode: 2Br-(l) --> Br2(g) + 2e-
      - Cathode: Pb2+(l) + 2e- --> Pb(l)
    - - Anode: 4OH-(aq) --> 2H2O(l) + O2(g) + 4e-
      - Cathode: Cu2+(aq) + 2e- --> Cu(s)