摘要
G·Schwarzenbach等人在他们提出的过量金属离子中和曲线法中引入了表观离解常数(K_t、K_f、K_s)。笔者认为该常数包含着实际并不为常数的游离金属离子浓度项([M]),因而概念不够严密,亦使计算复杂化。本文提出了该实验的新的数据处理方法。其处理结果与文献方法一致而物理意义更为明确。
G. Schwarzenbac et al. used superficial dissociation constants in pH-Titration method with the metallic ion in excess proposed by themselves. The present authors think that these constants comprise free metallic ion concentration which is not a constant in fact and thus do not have clear physical meaning and make calculation complicated. A new data-treatment method for the experiment of pH-Titration method with the metallic ion in excess is presented in this paper. The result is in agreement with that of literature and the physical meaning is clear.
关键词
金属离子
曲线
分析化学
平衡常数
coordinate chemistry
equilibrium constant
potentiometric titration/n-hexyl iminodiacetic acid
