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    ''Write a half equation for the formation of chloride ions from chlorine''

    Cl2 + 2e? ----> 2Cl?

    that is the answer ^^ (chlorine gaining electrons)

    however, could you write:


    CL2 ----> 2CL+2e- (chloride losing electrons)

    As the question doesn't specify which one?
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    (Original post by jamesrune75)
    ''Write a half equation for the formation of chloride ions from chlorine''

    Cl2 + 2e? ----> 2Cl?

    that is the answer ^^ (chlorine gaining electrons)

    however, could you write:


    CL2 ----> 2CL+2e- (chloride losing electrons)

    As the question doesn't specify which one?
    First one should read:

    Cl2 + 2e --> 2Cl-

    The second one is wrong...

    It should read:

    2Cl- - 2e --> Cl2

    or

    2Cl- --> Cl2 + 2e


    And, yes both are correct. One is just the reverse of the other. By convention we write the half equations as reductions:

    Cl2 + 2e --> 2Cl-
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