通常用氢电极及Ag-AgCl电极与一定质量摩尔浓度的HCl溶液所构成的电池测定HCl溶液的活度系数.使用氢电极必须有许多预防措施,否则将会降低它的效力.由于玻璃电极对氢离子活度较敏感,因此可用它代替上述电池的氢电极进行测量.用氢电极测定HCl溶液的平均活度系数是费事的,玻璃电极的使用提供了一个快速、简便的测量方法. The activity coefficient of the HCl solution is usually determined by a cell consisting of a hydrogen electrode and a Ag-AgCl electrode and a mass concentration of HCl solution. There are many precautions that must be taken to use the hydrogen electrode, as this will reduce its effectiveness. Hydrogen ion activity is more sensitive and can therefore be used instead of the hydrogen electrode of the cell described above. Measuring the average activity coefficient of a HCl solution with a hydrogen electrode is cumbersome, and the use of a glass electrode provides a quick and easy measurement.