电导法测定解离平衡常数及临界胶束浓度的实验改进

Experimental improvement on determination of ionization equilibrium constant of weak electrolyte and critical micelle concentration of surfactant

通过使用电导率仪的温度补偿功能和等温滴定电导实验方法使测量水溶液中醋酸的解离平衡常数和十二烷基硫酸钠的的临界胶束浓度实验过程得以简化,具体表现为在电导法测量弱电解质解离平衡常数实验过程中可以不使用恒温水槽、水浴夹套等恒温设备,而在电导法测量表面活性剂临界胶束浓度实验过程中则无需单独配置多个不同浓度的十二烷基硫酸钠溶液,以上实验改进可减轻学生在教学实验过程中的工作量,同时加深学生对电导率仪工作方式、等温滴定电导实验方法的理解。

Experimental improvement on determination of ionization equilibrium constant of weak electrolyte and critical micelle concentration of surfactant has been made by using temperature compensating function of conductometer and isothermal titration conductometry method.Through such improvements the workload of students in experimental teaching can be alleviated and the understanding on working mechanism of conductometer can be strengthened.