NEW CHARACTERISTICS OF THE INDUCTORY PHASE AND KINETIC-STUDY OF DL MALIC-ACID ACETONE BRO3- MN2+ H2SO4 CHEMICAL OSCILLATORY REACTION

As an extension of our previous study, this paper reports a new type o f oscillatory reaction system: DL - malic acid (abbreviated to DL - MA )-CH3COCH3 (abbreviated to Act)-Mn2+-H2SO4, and all factors that affec t the reaction. The role of each reactant in the inductory phase, the cause of oscillation,the new characteristics of the inductory phase an d possible mechanism of oscillatory reaction have been investigated. T he simulation equations in which the inductory phase is affected by co ncentration of DL - MA, KBrO3 and MnSO4 are obtained: t(IN)(c(DL-MA)) = - 0.051 +/- 0.096/(c(DL-MA) - 0.181) (where Act existed) t(IN)(c(DL- MA)) = - 0.24 + 0.224/(c(DL-MA) - 0.0485) (where Act does not existed) t(IN)( c(KBrO3)) = 73. 429 c(KBrO3), + 1.275 t(IN)(c(MnSO4)) = 99.5 c (MnSO4) + 4.2 The activation parameter of the inductory phase, E-IN is 68.50 kJ.mol(-1).