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  Home > JCE Print > Journal of Chemical Education > Issues > 1995  > August  >
General Interest
Double Disproportionations
M. E. Cardinali
Chemistry Department of the University, via Elce di Sotto, 10 06100 Perugia, Italy

C. Giomini and Ciancarlo Marrosu
ICMMPM Department of the University, via del Castro Laurenziano, 7 00161 Rome, Italy

Cover
August 1995
Vol. 72 No. 8
p. 716
Abstract
For some unusual redox reactions, a list of which is provided, there is only one element which undergoes oxidation number changes; it occurs in four different chemical species (two reactants and two products), showing four different oxidation states. Balancing the corresponding chemical equations by the classical oxidation number method may be difficult or impossible. The paper presents a method to circumvent these difficulties, by treating these reactions as double disproportionations, where both of the products are formed by the disproportionation of each of the reactants, and a suitable substance is introduced as co-reactant and co-product. The method does not renounce the oxidation number concept.

See Letter re: this article.
More Information
*  Citation
 Cardinali, Mario E.; Giomini, Claudio; Marrosu, Giancarlo. J. Chem. Educ. 1995 72 716.
*  Keywords
*  History
 Created:
Last Updated:		 10/1/1999
5/22/2006
Link to Letter added (May 2004).
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