What is the Standard oxidation potential of Ethanedioic acid?

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Clarification of Question by andy136-ga on 29 Oct 2002 04:59 PST

I'm actually looking for the Standard oxidation potential of the
oxidation of Ethanedioic acid:
	      (C2O4)2-(aq) --> 2(CO2)(g) + 2e-

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Request for Question Clarification by hailstorm-ga on 29 Oct 2002 16:42 PST

This is also known as oxalic acid, correct?

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Clarification of Question by andy136-ga on 29 Oct 2002 17:16 PST

yeah
also known as oxalic acid

The relevant table can be found after all, at:

http://cwx.prenhall.com/bookbind/pubbooks/petrucci8/medialib/standard_b.html

The half-reaction stated is 2CO2(g) + 2H+ + 2e- <-> H2C2O4(aq)

Flip the reaction around, and you'll get the oxidation potential of +0.49 Volts.

search terms:
Standard +Reduction +Potentials

Hope this helps!

-brightshadow

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Request for Answer Clarification by andy136-ga on 29 Oct 2002 23:51 PST

Can you give me the name of the book u found that table in?
and author, published date, publisher, where it was published (city)

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Clarification of Answer by brightshadow-ga on 30 Oct 2002 00:54 PST

General Chemistry - Principles and Modern Applications, Eighth Edition
by Ralph H. Petrucci (California State University, San Bernadino),
William S. Harwood (Indiana University, Bloomington),
and F. Geoffrey Herring (University of British Columbia)

Published by Prentice-Hall, printed 1998. 
(The online companion to the book, which I linked to earlier, is
copyrighted 2000/2001.)

http://www.amazon.com/exec/obidos/tg/detail/-/0130143294/qid=1035967744/sr=12-1/103-1441252-4756657?v=glance

($47 used hardcover on amazon.com.)

Cover shot: http://images.amazon.com/images/P/0130143294.01.LZZZZZZZ.jpg

(7th edition printing paperback can be had for like $16 on amazon
used, but I don't know what the differences are.)

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Clarification of Answer by brightshadow-ga on 30 Oct 2002 00:56 PST

Looks like the 8th edition is still in current print as of 2001, as
well.

http://www.amazon.com/exec/obidos/tg/detail/-/0130143294/qid=1035967744/sr=12-1/103-1441252-4756657?v=glance#product-details

+0.49 Volts.

I'd post it as an answer, but I don't have a URL to cite, just a table
in a book and no scanner..

This was also worked on in a homework question:
http://www.chem.yorku.ca/courses/chem1001/p/tutorials/echem_tut.pdf

But for this the answer turned out to be 0.48V.