Hydrogen peroxide will be used to oxidize the iron(II) in the complex ion to iro

Question

Hydrogen peroxide will be used to oxidize the iron(II) in the complex ion to iron(III). Several things happen in this reaction:

Iron(II) is oxidized to iron(III)

The oxalate ions that were attached to the iron(II) in the complex ion return to the solution (as oxalate ions)

Each hydrogen peroxide molecule is reduced to form two hydroxide ions

Part A - Oxidation of iron(II) to iron(III).

Write a balanced net ionic equation for the oxidation of the iron(II) complex ion with hydrogen peroxide. Make certain that your equation depicts all three things described in the introduction and that is it blanced for nujmber of electrons transferred (charge) as well as for atoms.

Explanation / Answer

1. Iron(II) to oxidizes to iron(III) with the release of one electron

Fe2+ ---> Fe3+ + 1e-

2. H2O2 accepts electrons from iron(II) and reduces to OH- ions

H2O2 +2e- -----> 2OH-

Thus the overall reaction may be depicted as

2Fe2+ + H2O2 ---> 2Fe3+ + 2OH-

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