电动势法测量离子平均活度系数和标准电极电位

Measure ment of Average Activity Coefficient of Ion and Standard Electrode Potential with the EMF Method

电动势方法就是通过测量电池电动势来研究一定体系的热力学性质、电化学性质等,是常用的一种电化学方法。本实验通过测不同浓度时的电池电动势,从而得出不同浓度CuSO4溶液中Cu2+的平均活度系数,以及通过作图外推法求铜电极的标准电极电势,得出较好的结果。

Through measuring the electromotive force of battery, the thermodynamics and electrochemical properties of certain system can be studied, which is called EMF method. It's an electrochemistry method in common use. In this experiment the average activity coefficient of different concentration solution was determined with EMF method. And by a graphical extrapolation, the standard electric potential of copper electrode was also obtained.