摘要
为了获得滴定分析的终点误差随待测物浓度、反应平衡常数这两个因素变化的准确规律,推导了有别于林邦终点误差公式的终点误差计算式,根据该式可以判断每个因素对计算结果的影响,结合在配位滴定分析和酸碱滴定分析中的具体应用,结果发现,这两个因素大小的变化不一定会导致终点误差绝对值的单调变化。
In order to acquire the accurate regulation as to how end-point error varying with two factors i.e.equilibrium constant of titration reaction and concentration of analyte,an other-than-Ringbom-formula end-point error formula is derived,where the effect of each factor on end-point error can be concluded.The applications of the new formula in both complexometric and acid-base titration demonstrate that the varying of either factor does not necessarily bring about monotonous varying of absolute value of the end-point error.
作者
岳宣峰
张茹梅
马佳睿
谢遵园
章书怡
肖雨晴
王怡华
张延妮
Yue Xuanfeng;Zhang Rumei;Ma Jiarui;Xie Zunyuan;Zhang Shuyi;Xiao Yuqing;Wang Yihua;Zhang Yanni(Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province,School of Chemistry and Chemical Engineering of Shaanxi Normal University,Xi’an,710062;Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry,School of Life Science of Shaanxi,Normal University,Xi’an,710062)
出处
《化学通报》
CAS
CSCD
北大核心
2023年第7期884-889,共6页
Chemistry
基金
陕西省自然科学基础研究计划项目(2022JZ-54)
陕西师范大学教学改革研究项目(22JG22,23JG33)
陕西师范大学大学生创新创业训练项目(202210718003x,202310718131)资助。
关键词
终点误差
反应平衡常数
浓度
配位滴定
酸碱滴定
End-point error
Reaction equilibrium constant
Concentration
Complexometric titration
Acid-base titration
