引用本文:
方嘉楠, 顾友昊, 桂泽轩, 张来英, 颜佳伟, 袁汝明, 徐晓明. 电动势法测定电解质溶液的平均活度系数实验改进和拓展[J]. 大学化学,
2025, 40(11): 263-271.
doi:
10.12461/PKU.DXHX202504055
Citation: Jianan Fang, Youhao Gu, Zexuan Gui, Laiying Zhang, Jiawei Yan, Ruming Yuan, Xiaoming Xu. Experimental Improvement and Expansion of the Electromotive Force Method to Determine the Mean Activity Coefficient of Electrolyte Solution[J]. University Chemistry, 2025, 40(11): 263-271. doi: 10.12461/PKU.DXHX202504055
Citation: Jianan Fang, Youhao Gu, Zexuan Gui, Laiying Zhang, Jiawei Yan, Ruming Yuan, Xiaoming Xu. Experimental Improvement and Expansion of the Electromotive Force Method to Determine the Mean Activity Coefficient of Electrolyte Solution[J]. University Chemistry, 2025, 40(11): 263-271. doi: 10.12461/PKU.DXHX202504055
电动势法测定电解质溶液的平均活度系数实验改进和拓展
English
Experimental Improvement and Expansion of the Electromotive Force Method to Determine the Mean Activity Coefficient of Electrolyte Solution
Abstract:
The electromotive force method for determining the mean activity coefficient of electrolyte solutions represents a fundamental experiment in physical chemistry. However, the conventional experimental procedure necessitates continuous hydrogen gas bubbling into the solution to establish a hydrogen electrode, thereby introducing potential safety hazards associated with hydrogen leakage and explosion risks. To mitigate these concerns, this study proposes an innovative modification: the implementation of electrolysis for hydrogen electrode preparation, thereby eliminating the need for continuous hydrogen gas introduction. This improved methodology obviates the requirement for hydrogen cylinders or generators during measurements, effectively eliminating the risks of hydrogen leakage and explosion while ensuring experimental safety. Furthermore, this redesigned experimental approach not only enhances students’ comprehension of theoretical concepts in physical chemistry but also equips them with practical skills in hydrogen electrode preparation through electrolysis.
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Key words:
- Laboratory safety
- / Physical chemistry
- / Experiment improvement
- / Self-made electrode
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