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    2 batteries are connected in circuit:
    Battery 1: Zinc in zinc sulphate gel, adjacent to Copper in copper sulphate gel.
    Battery 2: Two iron electrodes in 3% NaCl solution.

    What is the electrochemical reaction that takes place on both iron electrodes before connection?

    What is the electrochemical reaction that takes place on both iron electrodes after connection?

    Thanks for the help.
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    For the first question I thought that both electrodes might corrode because of the presence of NaCl.

    for the second question I thought that iron electrode that is the cathode will get bigger and the iron cathode that is the anode will decrease.

    Are either of these correct?
 
 
 
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