电池反应与电池及电动势的对应关系

THE CORRESPONDING RELATION BETWEEN A CELL REACTION AND THE CELL OR EMF

对于一个有不止一种价态的过渡元素金属及其离子的氧化还原反应，可以对应两种电池，这两种电池的电动势相差简单整数倍；而由汞及其两种离子的溶液组成的两种电池的电动势是相等的。

For a redox cell reaction of a transition metal and its ions which has more than one valence,two kinds of galvanic cells must be corresponding. The electromotive Forces (EMF) of those two kinds of cells are different by single integer times. But for two composed of mercury and its two kinds of ion solutions the EMF's are equal .