计算机计算滴定法测定极弱酸电离常数和含量  

The Count-titration of Computer for Determination of the Dissociation Constant and Content of Very Weak Acid

作　　者：张大伦 

出　　处：《武汉化工学院学报》1994年第3期12-16,共5页Journal of Wuhan Institute of Chemical Technology

摘　　要：本文对Ｉｎｇｍａｎ公式计算作了新的改进，即无须知道电离常数，仅用４～６组Ｖ－ｐＨ数据，便能同时测出其电离常数Ｋａ和等当点体积Ｖｅ。用本法计算了六种弱酸（Ｋａ≥１０^（－８））和四种极弱酸（Ｋａ＜１０^（－８））的Ｋａ值和含量。所得Ｋａ值基本上与文献相符。测定结果相对误差和相对标准偏差约０．２％，符合化学分析要求。A new count-titration of computer has been provided to improve the calculation of Ingman formula. This method can be used for the count of dissociation constants Ka. and titration data V-pH , and it is unnecessary to know the dissociation constants Ka previously.The calculated values Ka are in agreement with the values that were reported in literatures.Six kinds of weak acid and four kinds of very weak acid are measured experimentally, yielding the results with relative errors of about 0. 2% and the relative deviations of about 0. 2% which meet the requirement of general chemical analysis.

关 键 词：计算机计算滴定法 极弱酸的测定 电离常数的测定 

分 类 号：TQ015.9[化学工程]