大学化学2016，Vol.31Issue(10)：68-73,6.DOI:10.3866/PKU.DXHX201601035
活度系数法测定A2B型难溶盐的溶度积--以Ag2SO4为例
Solubility Product Determination of A2B Type Insoluble Salts by the Activity Coefficient Method:Taking Ag2SO4 as an Example
摘要
Abstract
Taking the assumption that activity of silver ion and sulfate ion of very low concentration is constant in any aqueous solution, the primary cel was designed for the cel reaction of Ag2SO4(s)→2Ag+(aq)+SO42-(aq). The compensation method was used to obtain the electromotive force of the primary cel when the concentrations of AgNO3 and K2SO4 changed. The relationship between electromotive force and the mean activity coefficients of electrolytes as wel as the solution concentration was deduced according to the Nernst equation and the limit Debye-Huckel formula. Standard electromotive force E⊖was obtained by extrapolation. Final y, the solubility product of silver sulfate was calculated through the relationship between equilibrium constant and electromotive force of the primary cel .关键词
活度系数法/原电池/溶度积常数Key words
The activity coefficient method/Primary cel/Solubility product分类
社会科学引用本文复制引用
李瑜,朱金华,饶秋华,宋玉苏,周子龙,郑炀..活度系数法测定A2B型难溶盐的溶度积--以Ag2SO4为例[J].大学化学,2016,31(10):68-73,6.基金项目
海军工程大学教学研究项目(2015JB-06，NUE2013224) （2015JB-06，NUE2013224）
