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    STUDIA CHEMIA - Issue no. 1 / 2007  
         
  Article:   KINETICS AND OXIDATION MECHANISM OF LACTIC AND MALIC ACIDS BY PERMANGANATE IN ACIDIC MEDIA.

Authors:  ALEXANDRA RUSTOIU-CSAVDARI, I. BALDEA.
 
       
         
  Abstract:  Kinetic studies on the oxidation of malic and lactic acids by permanganate in acidic solutions have been carried out. In the presence of Mn(II) three ways of consumption of Mn(VII) are involved: a direct oxidation of the hydroxy acid, an oxidation of Mn(II) to Mn(III) and a catalytic route. The experimental rate law is quite complex. It involves a condensed esteric type compound for the direct oxidation by permanganate and two other parallel ways: one leading to a first-order and the other to a second order term with respect to Mn(II) as catalyst.  
         
     
         
         
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