MeOH-H~2O-NaOAc体系(278.2~318.2K)的电导研究

本文测定了278.2~318.2K间的五个温度下七种浓度的NaOAc分别在10, 20,30, 40, 50, 60, 70, 80, 90及100%MeOH-H~2O体系中的摩尔电导Λ, 并应用FOS,Pitts, L-W, F-78等四个电导方程对实验数据进行了拟合处理, 得到了三个拟合参数Λ~O, K~Λ及R(或α)。最后, 对四个方程与实验的吻合程度, 温度、溶剂组成等对Λ~O、K~Λ的影响规律及溶质-溶剂相互作用进行了讨论。

Conductance study on MeOH-H~2O-NaOAc systems in 278.2~318.2K.

The molar conductances of NaOAc in 10-100 wt.% aqueous MeOH at 278.2, 288.2, 298.2, 308.2 and 318.2K were determine The four groups of best fitting parameters, such as the limiting molar conductance, L0, the ions association constant, KA, and the distance parameter, R (or a), were evaluated from Fuoss-Onsager-Skinner, Pitts, Lee-Wheaton and Fuoss-1978 conductance equations, resp. A discussion about the applicability of the four conductance equations, the dependence of L0, KA, the Walden product, L0h, and the ion-solvent interactions on temperature and the wt.% of MeOH in the systems are given.