| 二级微商法确定弱酸碱电位滴定终点准确度的分析 |
| |
| 引用本文： | 开小明.二级微商法确定弱酸碱电位滴定终点准确度的分析[J].安庆师范学院学报(自然科学版),2001,7(2):31-34. |
| |
| 作者姓名： | 开小明 |
| |
| 作者单位： | 安庆师范学院,化学系,安微,安庆,246011 |
| |
| 基金项目： | 安徽省高校基础课程教学实验室基金;15; |
| |
| 摘 要： | 从理论上分析了二级微商法确定电位滴定终点对强酸碱、弱酸碱准确度的影响。发现在一定的条件下 ,只有 Ka≤ 1.13× 10 -7时 ,用二级微商法确定电位滴定终点才能提高准确度 ,而对于 Ka或 Kb比较大 ,以至于强酸碱 ,二级微商法确定电位滴定终点并不能提高准确度。另外 ,在终点附近 ,滴定体积应小而相等 ,也有利于提高分析结果的准确度。
|
| 关 键 词： | 二级微商法 弱酸电位滴定 电位滴定终点 准确度 |
| 文章编号： | 1007-4260(2001)02-0031-04 |
| 修稿时间： | 2000年10月20日 |
A Accuracy investigation of second derivative method to determine an end point of weak acid-Bases potentiometric titration |
| |
| KAI Xiao-ming.A Accuracy investigation of second derivative method to determine an end point of weak acid-Bases potentiometric titration[J].Journal of Anqing Teachers College(Natural Science Edition),2001,7(2):31-34. |
| |
| Authors: | KAI Xiao-ming |
| |
| Abstract: | used second derivative method to determine an end point of potentiometric titration,the effects of titration accuracy to strong acid bases and weak ones were theoretically analyzed.In some condition,it was found that there is better used second derivative method to determine an end point of only K a≤1.13×10 -7 .When K a or K b is bigger till strong acid bases,it doesn't improve accuracy.Otherwise,near a theminate point,titration volume is small and equality,it also improves accuracy. |
| |
| Keywords: | Second derivative method weak acid bases potentiometric titration end point of potentiometric titration accuracy |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
