多重平衡体系中电极电势的简易计算方法

A Simple Method for Calculating Electrode Potential in Multiple Equilibrium System

针对在多重平衡体系中计算标准电极电势的现有方法存在难以理解的问题,本文从标准电极电势的基本概念出发,先将欲求电极反应适当拆分为多重平衡反应,再结合电极电势Nernst方程的应用条件来求解氧化还原电对的电极电势值,可达到表达既简明直观又能使学生深刻理解的目的。

To aim at the difficult understanding of available solutions for calculating of the standard elec- trode potential in multiple equilibrium systems, the values of electrode potential of oxidation-reduction pair, based on the basic concept of standard electrode potential, were calculated out by splitting the de- sired electrode reaction into multiple equilibrium reactions combining with the use conditions of the Nernst equation of electrode potential. This provided solution is not only simple and easy to be accepted but also can help the students to understand the essence of the standard electrode potential in multiple e- quilibrium system.