Chemistry

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How many electrons are transferred in the reaction of hydrogen peroxide with iron (II) ion in
acidic solution to form iron (III) ion and water?

  • Chemistry -

    I looked up two half reactions form a "Standard Reduction Potentials" table. The 2nd half reaction occurred in reverse as an oxidation. I doubled this reaction so that the number of electrons gained and lost are equal. Then I combined the two half reactions into an overall reaction. This is needed to see how many electrons are transferred from H2O2 to Fe^+2. [Unless you have studied this material in your chemistry class it may be confusing.]
    The two half reactions are:
    H2O2 + 2H+(aq) + 2e- --> 2H2O (reduction)
    2Fe^+2(aq) --> 2Fe^+3(aq) + 2e- (oxidation)
    The overall reaction is:
    H2O2 + 2H+(aq) + 2e- + 2Fe^+2(aq) --> 2H2O + 2Fe^+3(aq) + 2e-
    or
    H2O2 + 2H+(aq) + 2Fe^+2(aq) --> 2H2O + 2Fe^+3(aq)
    The above show 2 electrons going to a molecule of H2O2 from two Fe^+2 ions which oxidize to form two Fe^+3 ions.

  • Chemistry -

    Balance the equation: MnO4¡V + H+ + Fe2+ Mn2+ + H2O + Fe3

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