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混合酸的滴定是滴定分析中比较难处理的问题,采用巳有线性滴定图解法也必须对相互干扰进行修正,其缺点是计算量大、线性方程复杂。因此,本文提出一种新图解法。新图解法原理设C_(0B)为NaOH标准溶液的浓度,V为滴入的体积;V_0为被滴液的体积;混合酸中HAⅠ的形成常数为K_(HA1)~H,初始浓度为C_(0A1),瞬时浓度为C_(A1);HAⅡ的形成常数为K_H~HA_(11),初始浓
Titration of mixed acids is a difficult problem in titration analysis. The linear titration method must be used to correct the mutual interference. The disadvantage of this method is the large amount of calculation and complicated linear equations. Therefore, this paper presents a new graphical method. The new schematic principle set C_ (0B) NaOH standard solution concentration, V is the volume of the drop; V_0 is the volume of the drop; mixed acid HA Ⅰ formation constant K_ (HA1) ~ H, the initial concentration of C_ (0A1), instantaneous concentration of C_ (A1); HA Ⅱ formation constant K_H ~ HA_ (11), the initial concentration