University Chemistry ›› 2015, Vol. 30 ›› Issue (5): 45-51.doi: 10.3866/pku.DXHX20150545

• Chemistry Laboratory • Previous Articles     Next Articles

A Research-Oriented Chemical Experiment on pH Oscillation

Yang Shan1,2, Hou Yulong1, Hu Daodao1   

  1. 1. School of Materials Science and Engineering, Shaanxi Normal University, Xi'an 710062, Shaanxi, China;
    2. College of Chemistry and Life Science, Weinan Normal University, Weinan 714099, Shaanxi, China
  • Published:2015-10-24


BrO3--SO32--Fe(CN)64-(BSF) is a typical pH oscillating system with the large amplitude. The ampli- tude and period of this oscillation are adjustable. And this oscillation can be combined with pH sensitive materials in order to carry out to facilitate the transformation of other oscillation behaviors with the pH stimulation. Compare with the traditional B-Z oscillation in physical chemistry experiment, this pH oscillation based experiment can be expanded for comprehensive or research-oriented experiment, which is helpful for the comprehensive ability and the innovation ability training.

Key words: pH oscillation, Bromate-sulfite-ferrocyanide (BSF) system, Oscillating behavior, Activation energy