大学化学 >> 2024, Vol. 39 >> Issue (8): 197-203.doi: 10.3866/PKU.DXHX202312004

化学实验 上一篇    下一篇

乙酸乙酯皂化反应和碘钟反应实验改进

张睿桐, 曾志强, 张晓光   

  1. 南开大学化学学院, 天津 300071
  • 收稿日期:2023-12-04 修回日期:2024-01-09 发布日期:2024-02-21
  • 通讯作者: 张晓光 E-mail:xgzhang@nankai.edu.cn
  • 基金资助:
    南开大学实验教学改革项目(23NKZZYQ01)

Improvement of Ethyl Acetate Saponification Reaction and Iodine Clock Reaction Experiments

Ruitong Zhang, Zhiqiang Zeng, Xiaoguang Zhang   

  1. College of Chemistry, Nankai University, Tianjin 300071, China
  • Received:2023-12-04 Revised:2024-01-09 Published:2024-02-21
  • Contact: Xiaoguang Zhang E-mail:xgzhang@nankai.edu.cn

摘要: 针对乙酸乙酯皂化反应和碘钟反应存在溶液恒温效率低、温度不均匀以及溶液混合不均匀、反应不均匀、数据偏差大等问题,从反应器和反应物的混合方式两方面进行改进,即采用夹套烧杯配合反应瓶作为反应器,使用多点位磁力搅拌器快速混合反应物。改进后使溶液恒温均匀稳定、高效,同时反应物分散均匀、反应快速,可以准确地测量溶液的电导率和变蓝时间,从而得到准确的反应级数、速率常数、活化能等数据。

关键词: 乙酸乙酯皂化反应, 碘钟反应, 夹套烧杯, 实验改进

Abstract: This study addresses issues such as low efficiency in maintaining a constant temperature, uneven temperature distribution, uneven mixture, uneven reaction, and large deviations in experimental data observed in the ethyl acetate saponification reaction and iodine clock reaction. To address these problems, improvements are made in two aspects: the reaction vessel and the mixing method of reactants. The use of a jacketed beaker paired with a reaction flask as the reaction vessel and a multi-site magnetic stirrer for rapid mixing of the reactants is proposed. This improvement ensures a uniform and stable temperature in the solution, enhances the uniform dispersion and rapid reaction of the reactants, and enables accurate measurements of solution conductivity and the time for color change. The obtained data provides accurate values for reaction order, rate constant, and activation energy.

Key words: Saponification reaction, Iodine clock reaction, Jacket beaker, Experimental improvement