电导法测定298K时NdCl_3在DMF和H_2O中的活度系数  

A Study of the Activity Coefficient of Rare Earths Salt NdCl_3 in DMF and H_2O with Conductivity Method at 298K

作　　者：王卫东[1] 

机构地区：[1]湖北师范学院化学与环境工程系,湖北黄石435002

出　　处：《湖州师范学院学报》2005年第1期44-46,共3页Journal of Huzhou University

基　　金：湖北师范学院自然科学基金项目(2003B10);湖北师范学院人才引进资助科研项目(2004R02)

摘　　要：应用电导法在298K时测定了稀土氯化盐NdCl3 在混合溶剂(DMF H2O)中的电导率;利用公式计算了NdCl3 的摩尔电导率;应用Kohlraush经验规则,使用Origin软件进行线性拟合,外推得到298K时NdCl3 在混合溶剂(DMF H2O)中的无限稀释摩尔电导率λ0 = 300.01 (S·cm2 ·mol-1);应用Debye Hücker 和OsagerFalkenhangen公式计算了NdCl3 在混合溶剂(DMF H2O) 中的活度系数,并讨论了在298K 时浓度对稀土盐NdCl3 溶液活度系数的影响,随稀土氯化盐溶液浓度的增加,稀土盐溶液的活度系数降低.This paper shows the results of determining the electric conductivity of Rare Earths salt NdCl 3 in DMF and H 2O by adopting the conductivity method at 298K, of calculating the molar conductivity λ 0 of NdCl 3 in DMF and H 2O at 298K by using formula, of inferring the molar conductivity at infinite dilution λ 0 =300.01 (S·cm 2·mol -1 ) of NdCl 3 in DMF and H 2O obtained by linear fitting at 298K by using the Kohlraush formula and the Origin Software and of calculating the activity coefficient of NdCl 3 in DMF and H 2O at 298K by using the DebyeHücker and OsagerFalkenhangen formula, and discusses the effect of concentration on the activity coefficient of electrolyte solution at 298K,with the conclusion that with the increase of the concentration of Rare Earths salt in the solution, the activity coefficient of Rare Earths salt in the solution gets lower.

关 键 词：电导法 活度系数 稀土氯化盐 NDCL3 DMF(N N-二甲基甲酰胺) H2O 

分 类 号：O646-1[理学—物理化学]