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March 25, 2017

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The standard potential of this cell
Sn|Sn^+2 || Cr^+3|Cr is -0.60 V , what is the reductional standard potential of
Cr^+3|Cr ? if we know that reduction potential of Sn is
Sn^+2 + 2e- <==> Sn : -0.14 V

  • CHEMISTRY - ,

    I wonder if this is a made up problem?
    Sn^2+ + 2e ==> Sn E = -0.14
    Cr --> Cr^3+ + 3e E = ?
    ----------------------
    Ecell = -0.60 then Cr must be -0.46 written as an oxidation so as a reduction it would be +0.46 but that isn't what it gives in the tables.

  • CHEMISTRY - ,

    But the standard Eo of Cr electrode is -0.74

  • CHEMISTRY - ,

    You repeated my line but didn't answer if this was a made up problem or not. I don't like that answer until I have more information about the question.

  • CHEMISTRY - ,

    Of course it's not a made up problem , it's only a question in our homework
    Sometimes , I'm just confused on some fine and tiny problems , just it is..
    I'm sorry for any mistake
    and , I'm very grateful

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