基于质子条件式的终点误差精确式

Precise Expressions of End Point Error Based on Proton Balance Equation

容量分析中,滴定终点的误差决定了该分析方法的可靠性。根据质子条件式,可推导出终点误差的精确式。该表达式用滴定开始前而不是终点时物质的浓度进行计算;用滴定终点时的p H进行计算,不需要计算化学计量点时的p H;所得出的精确式具有通用性,能有效降低学习与记忆的难度,提高计算结果的准确度。

In volumetric analysis,error of titration determines the reliability of the analysis method. According to the proton balance equation,the precise expressions of the end point error can be derived. The expressions were calculated using the concentration of the substance at the beginning of the titration rather than the end point. The expressions were calculated with the p H at the end point of titration, and not need to calculate the p H at stoichiometric point. The expressions are universal,which can effectively reduce the difficulty of learning and memory,and improve the accuracy of the calculation results.