铅氯络合离子生成反应的平衡常数
来源期刊:中南大学学报(自然科学版)1981年第4期
论文作者:郑蒂基
文章页码:10 - 15
关键词:反应平衡常数; 络合离子; 生成反应; 离子强度; 电动势法; 湿法冶金; 测定结果; 浓差电池; 配位数; 水溶液
摘 要:为给铅湿法冶金有关反应体系的热力学分析提供基本数据,用电动势法测定了高离子强度(I=5)和升温条件下铅氯络合离子生成反应的平衡常数。测得不同温度下的平衡常数值分别为:25℃时,K1=101.28,K2=101.75,K2=102.12,K4=101.50;50℃时,K1=101.44,K2=101.91,K3=102.26;K4=1.65;75℃时,K1=101.56,K2=102.04,K3=102.33,K4=101.35,K5=101.24。
Abstract: In order to provide fundamental data for the thermodynamic analysis of reaction systems involved in hydrometallurgy of lead, equilibrium constants for the formation reactions of lead (Ⅱ) -chloro complexes at high ionic strength(I = 5) and elevated temperatures have been determined hy using potentiometric methods. The values of equilibrium constants at different temperatures are as follows: K1 = 101.28, K2= 101.75, K3 = 102.12. K4 = 101.5, at 25℃; K1= 101.44,K2 = 101.91, K3 = 102.26, K4 = 101.65, at 50℃; K2= 101.56, K2 = 102.04, K3 = 102.38,K4 = 101.85, K5= 101.24, at 75℃.