在电化学中,电极电位是个很基本的概念,但是由于它的名称不够确切,因之很多学生对它误解,而大多数的物理化学教科书对它的介绍也不够妥当。例如在南京大学物理化学教研组等编的“物理化学”,下册486页上写道“……任一电池的电动势都是两个电极电位的代数和,但是到目前为止,我们还没有实际的方法来测定单电极电位(亦称半电池的电位)的绝对值,因为实测的电动势,总是两个半电池电极电位的和。但是这个困难并不影响到对电动势的计算,因为事实上我们用不到知道电极电位的绝对值。只需任选一个电极作为标准,指定其电极电位为零,然后求其他电极电位的相对数值就可以了。”上面这样的讲法很容易使读者 In electrochemical, the electrode potential is a very basic concept, but because of its lack of exact name, many students misunderstood it, and most physicochemical textbooks did not introduce it properly. For example, in “Physical Chemistry” edited by Nanjing University Physicochemical Research Group and so on, the next volume on page 486 states “... the electromotive force of any cell is an algebraic sum of the two electrode potentials, but so far we have not had any actual Method to determine the absolute value of a single electrode potential (also known as the half-cell potential) because the measured emf is always the sum of the two half-cell electrode potentials, but this difficulty does not affect the calculation of the emf since in fact we It is not necessary to know the absolute value of the electrode potential. Just select one of the electrodes as the standard, specify the electrode potential to zero, and then find the relative values ​​of the other electrode potentials. ”The above argument is easy for readers