以电极电势书写能斯特方程

Writing Nernst Equation with Electrode Potential

能斯特方程是联系电化学与热力学的桥梁,表达了在某温度下电池的电动势与标准电动势及参与反应体系中各物质的浓度或活度之间的关系,在电化学基础中占据重要的地位。鉴于在学习能斯特方程过程中,对于复杂的化学反应直接根据电池的总反应书写能斯特方程时,对数项中各物质的浓度书写容易出错,通过探索发现先写出每一电极电势的能斯特方程,然后用正极的电极电势减去负极电极电势就可得到电池电动势的能斯特方程,可以避免这些问题,使能斯特方程的书写变得准确无误、方便简单。

The Nernst equation is a bridge between electrochemistry and thermodynamics.It expresses the relationship between the electromotive force of a battery at a certain temperature and the standard electromotive force and the concentration or activity of each substance participating in the reaction system.It occupies the basis of electrochemistry.Important position.Since in the process of learning the Nernst equation,when writing the Nernst equation directly for the complex chemical reaction according to the total reaction of the battery,the concentration of each substance in the number of entries is easy to make mistakes,the author discovered through writing in the study The Nernst equation of the potential of each electrode,and then the Nernst equation of the battery electromotive force can be obtained by subtracting the negative electrode potential from the positive electrode potential,which can avoid these problems and make the writing of the Nernst equation accurate and convenient.simple.