物理化学学报 >> 2001, Vol. 17 >> Issue (08): 676-681.doi: 10.3866/PKU.WHXB20010802

研究论文 上一篇    下一篇

BrO-3-SO2-3-H-KMnO4 系pH振荡反应

刘治建;蔡遵生;宁宇;李艳妮;王贵昌;赵学庄   

  1. 南开大学化学系,天津 300071
  • 收稿日期:2000-12-12 修回日期:2001-02-20 发布日期:2001-08-15
  • 通讯作者: 蔡遵生 E-mail:caizhunsh@nankai.edu.cn

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 E-mail:caizhunsh@nankai.edu.cn

摘要: 在BrO-3--H+-KMnO4振荡体系的基础上,通过改变反应参数,研究了对体系振荡现象的影响,发现了一些新的现象,如颜色的振荡,无沉淀的高pH值稳态及沉淀的生成等, 并结合我们的实验对现象进行了解释,对前人提出的机理进行了改进,在此基础上绘制了KMnO4的浓度对CSTR的总流量的相图([KMnO4]- Kf).

关键词: pH振荡, BrO-3, 反应机理, 相图

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