Acta Phys. -Chim. Sin. ›› 1993, Vol. 9 ›› Issue (02): 218-223.doi: 10.3866/PKU.WHXB19930214

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Studies on the Oscillation of m-C6H4(OH)2-KBrO3-H2SO4 System

Gao Zhi-Di; Liu Jun-Li; Han De-Gang; Shen Shi-Gang; Wang An-Zhou   

  1. Department of Chemistry, Peking University, Beijing 100871; Department of Chemistry, Hebei University, Baoding 071002
  • Received:1991-10-07 Revised:1992-07-17 Published:1993-04-15
  • Contact: Gao Zhi-Di

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Abstract: The oscillations of m-C_6H_4(OH)_2-KBrO_3-H_2SO_4 (system A) as well as m-C_6H_4(OH)_2-KBrO_3-H_2SO_4-MnSO_4(system B) have been studied. The relations between induction period as well as oscillating period and the initial concentrations of reactants as well as temperatures of the system have been determined experimentally.
With low concentrations of Mn~(2+), system B exhibits two types of oscillation phenomena, ie, after the first type of oscillation and through a certain time interval, a second type of oscillation occurs. The characteristics of the two types of oscillation are different. The oscillating behavior of the first type of oscillation is similar to that of system A. The second type of oscillation may exhibit period-double-monotonous phenomena, which supports the idea in reference[1]. With higher concentrations of Mn~(2+), the second type of oscillation disappears and the system exhibit only one oscillation. System B is one of the typical examples showing the two types of oscillations.

Key words: Chemical oscillation, Induction period, Oscillting period, Period-double-monotonous phenomena, Bi-oscillation