中文摘要：

摘要利用标准吉布斯自由能变化△rGθm与标准电极电势和标准反应平衡常数问的联系，分析不同标态下电极标准电极电势问的关系。根据这一思想，以水解离平衡为例，讨论了设计原电池求化学反应平衡常数的一般方法。

英文摘要：

Based on the relationship between the standard Gibbs free energy change, the standard electrode po- tential and the standard reaction equilibrium constant, the relationship between standard electrode potentials in differ- ent standard states has been analyzed. Accordingly, the general method to calculate the reaction equilibrium constant by designing a Galvanic battery is discussed, taking the dissociation equilibrium of water as an example.