Chp9_FeCytochrmProb

Chp9_FeCytochrmProb - Pt pH H M aq O H M Fe M Fe Pt 5 , 01...

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For the free ions in aqueous solution, Fe 3+ /Fe 2+ , the standard reduction potential for the half-reaction, 2 1 3 1 Fe e Fe , is +0.771V . When the iron is bound to Cytochrome-a however, this value changes significantly. Calculate the standard reduction potential of 2 1 3 1 Fe e Fe in Cytochrome-a given that the cell potential, E , of the following cell is +1.233V where the iron species are presumed to be in the presence of Cytochrome-a :
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Unformatted text preview: Pt pH H M aq O H M Fe M Fe Pt 5 , 01 . , 10 . 1 , 10 . 1 1 2 2 6 3 4 2 Hints: the peroxide reduction half-reaction is: O H e H aq O H 2 1 1 2 2 2 2 2 ) ( which is found in your table with a standard state reduction potential of +1.76 V. Begin by working out the net balanced cell reaction as prescribed by the cell notation. Btw, H 1+ is H 3 O 1+ ....
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This note was uploaded on 03/29/2009 for the course CH 201 taught by Professor Warren during the Fall '07 term at N.C. State.

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