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 capacity analysis, the error of the titration endpoint determines the reliability of the analytical method. According to the proton condition, we can derive the exact formula of the end point error. The expression is calculated using the concentration of the substance before titration instead of at the end; with p H at the end of the titration, p H at the stoichiometric point need not be calculated; the exact formula obtained is versatile and can be effectively reduced Learning and memory difficulties, improve the accuracy of the calculation results.