§4-3电位法测定溶液的pH值 To pH meter Saturated calomel Glass electrode electrode 一Wax insulation Ag wire Solution of unknown pH Heavy-walled Ag wire glass Thin glass Thin glass O.1M HCI membrane membrane saturated Magnetic stirrer with AgCl 指示电极：玻璃电极；参比电极：饱和甘汞电 极；测定仪器： 高阻抗毫伏计（精度士0.1mV) §4-3电位法测定溶液的pH值 指示电极：玻璃电极；参比电极：饱和甘汞电 极；测定仪器：高阻抗毫伏计（精度±0.1mV)