ELECTRON-TRANSFER OXIDATION-KINETICS OF NA-2[MO(2)O(4)EDTA] BY S2O82-ION IN DILUTE-ACID MEDIUM

Na-2(Mo(2)(V)O(4)EDTA).4H(2)O crystals have been prepared in pure form . Kinetics for the oxidation of the compound by S2O82- have been studi ed spectrophotometrically in dilute sulphuric acid medium. The effects of hydrogen ion concentration, metal ion concentration, S2O82- ion co ncentration, and temperature on the process have been studied. Rate eq uations have been derived to explain the experimental observations. On the basis of the observations, suitable mechanisms have been suggeste d. The kinetic parameters E, Delta H-not equal, and Delta S-not equal of the process have also been determined. (C) 1997 John Wiley & Sons, Inc.