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现有的酸碱滴定终点误差计算方法归为两类,一类是针对不同滴定体系提出不同的计算公式;另一类是仿造林邦误差公式,但不同体系的终点误差计算公式形式上仍不相同。至今未有简明且通用的计算方法。本文从酸碱滴定反应的本质出发,首次明确提出了适用于所有酸碱滴定体系的终点误差计算方法,并做了深入的论证。即只需写出化学计量点时滴定产物的质子平衡式,左右两式之差即为滴定终点误差。简明通用,可大大简化相应的教学内容。
There are two types of calculation methods for the endpoint error of acid-base titration. One is to propose different calculation formulas for different titration systems and the other is to copy the Lyapunov error formula. However, the formula of end-point error for different systems is still not formally the same. So far there is no concise and general method of calculation. Based on the nature of the acid-base titration reaction, this paper firstly put forward the calculation method of the end point error which is suitable for all acid-base titration systems for the first time and makes a deep demonstration. That is, just write down the stoichiometry of the titration product when the proton equilibrium type, the difference between the left and right is the titration end point error. Concise and versatile, can greatly simplify the corresponding teaching content.