期刊信息
- 刊名： 河北师范大学学报（自然科学版）Journal of Hebei Normal University (Natural Science)
- 主办： 河北师范大学
- ISSN： 1000-5854
- CN： 13-1061/N
- 中国科技核心期刊
- 中国期刊方阵入选期刊
- 中国高校优秀科技期刊
- 华北优秀期刊
- 河北省优秀科技期刊
Determination of the First Equivalence Point of the Mixed Bases by Back Titrimetric Method
摘要/Abstract
摘要：
采用滴定剂HCl稍过量, NaOH标准溶液返滴定过量HCl的方法, 较准确地确定碳酸钠第一计量点.并通过分光光度测定, 对该法进行了对比验证.通过实际样品测定, 滴定误差均在0.5%以下。
Abstract：
A back titrimetric method is used to accurately determine the first measurement point of the mixed bases.In the method, a standard solution of sodium hydroxide is used to titrate the little excess standard hydrochloric acid. The contrast experiment is studied by spectrophotomentry. Experimental results of the determination for real samples show that the titration error is less than 0.5 %.
关键词
Key words：
back titration
;
spectrophotometry
;
mixed alkali
;
the first equivalence point