Resumen de Double Disproportionations

C. Giomini, Ciancarlo Marrosu, M. E. Cardinali

• 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.