University Chemistry ›› 2016, Vol. 31 ›› Issue (3): 55-63.doi: 10.3866/PKU.DXHX20160355

• Chemistry Laboratory • Previous Articles     Next Articles

Determination of the Second-Order Rate Constant for the Saponification of Ethyl Acetate by Real-Time Conductivity Measurements

Yi ZHANG1,Zhe ZHANG1,Ming-Zhu LIU1,Jin LI1,Ran QIN1,Yi-Shan WANG1,Jiong ZHENG1,Shen ZHENG2,Jian-Hao LAI2,Ran CHEN2,Er-Ya GAO2,Dan-Tong LI2,Xiao-Qi ZHU2,Ji LI3,You-Qi YAN3,Xue-Zhi FENG3,Ming ZHAO3,*(),Xin HU3,*()   

  1. 1 Beijing Zhong Ke Fan Hua Measurement & Control Technology Co., Ltd, Beijing 100083, P. R. China
    2 School of Basic Medicine, Peking University, Beijing 100191, P. R. China
    3 School of Pharmaceutical Sciences, Peking University, Beijing 100191, P. R. China
  • Published:2016-04-06
  • Contact: Ming ZHAO,Xin HU E-mail:sunmoonzhao@bjmu.edu.cn;huxinbjmu@bjmu.edu.cn
  • Supported by:
    北京大学药学院教学改革项目

Abstract:

Determination of the second-order rate constant for the saponification of ethyl acetate has been a classical experiment in the physicochemical laboratory course for more than thirty years. In this paper, a new measurement system composed of the conductivity sensor and the computer equipped with the Nextkit Nano data acquisition card programmed with LabVIEW 2013, has been designed and constructed for multi-channel, parallel, real-time, and automatic acquisition of conductivity data. This setup has improved the teaching efficiency, and sets up an example for the future reforms of other classical experiments in chemical laboratory courses.

Key words: Rate constant of chemical reactions, Conductivity, Real-time measurement, Parallel measurement, Multi-tunnel measurement

MSC2000: 

  • O6-3