Acta Phys. -Chim. Sin. ›› 2001, Vol. 17 ›› Issue (08): 676-681.doi: 10.3866/PKU.WHXB20010802

• ARTICLE • Previous Articles     Next Articles

BrO-3-SO2-3-H-KMnO4 pH Oscillation Reaction

Liu Zhi-Jian;Cai Zun-Sheng;Ning Yu;Li Yan-Ni;Wang Gui-Chang;Zhao Xue-Zhuang   

  1. Department of Chemistry,Nankai University,Tianjin 300071
  • Received:2000-12-12 Revised:2001-02-20 Published:2001-08-15
  • Contact: Cai Zun-Sheng

Abstract: Based on the BrO-3--H+-KMnO4 pH oscillation system ,the effect of changing the reaction parameters on the properties of the oscillation system was studied.Some new phenomena,such as the color oscillation of MnO(OH)+ and the appearance of MnO2 precipitation were found.These phenomena by our modified reaction mechanism including an autocatalytic process of MnO(OH)+ were explained,and its phase diagram on the [KMnO4]-Kf plane was drawn( see Fig.7).

Key words: pH oscillation, BrO-3, Reaction mechanism, Phase diagram