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在生产和科研中经常需要同时测定强电解质浓度和混合溶剂的比例。本文在研究强电解质+水+醇三元溶液电导特性的基础上,建立了两参数经验性电导工作方程,将溶液电导率的测量与电导滴定相结合,可以方便准确地定出此类三元溶液的组成。 所用试剂均为AR或GR级,所用水为去离子水,强电解质+水+醇溶液按常规方法配制。溶液电导率在25±0.05℃用DDS-11型电导率仪测量,精度为1.5％。电导滴定的偏差小于0.3％。
In production and research, it is often necessary to simultaneously determine the concentration of the strong electrolyte and the proportion of the mixed solvent. Based on the study of the conductance properties of the ternary solution of strong electrolyte + water + alcohol, a two-parameter empirical conductance equation was established. By combining the measurement of the solution conductivity and the conductometric titration, it is convenient and accurate to determine such ternary Composition of the solution. Reagents are AR or GR grade, the water used for deionized water, strong electrolyte + water + alcohol solution prepared by conventional methods. The conductivity of the solution was measured at 25 ± 0.05 ° C using a DDS-11 conductivity meter with an accuracy of 1.5%. Conductivity titration deviation is less than 0.3%.