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chem

posted by on .

write the balanced half reaction for the reaction of Al3+ to Al
(3+ is the oxidation state)
i don't understand... wouldn't you just subtract 3 electrons from the Al3+
to make it neutral? and then the final answer would be Al-> Al?
please help.. i don't understand..

  • correction - ,

    write the balanced half-reaction equation for the reduction of Al3+ to Al.

    i'm sorry; I'm getting tired :)

  • chem - ,

    Not quite.
    You want Al^+3 + 3e ==> Al.
    And you are adding three electrons and not subtracting them. It's a reduction because you are adding electrons. Oxidation is the loss of electrons.

  • chem - ,

    ohh ok that makes sense. thank you!

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