离子交换法测定碘化铅溶度积常数的实验改进  

Improved Experiments for the Solubility Product Constant Determination of Lead Iodide by Ion Exchange

作　　者：熊佳盈 杨言言 胡婷 纪念 湛正艳 余钟亮 Xiong Jiaying;Yang Yanyan;Hu Ting;Ji Nian;Zhan Zhengyan;Yu Zhongliang(Shangrao Normal University,Shangrao 334001,China)

机构地区：[1]上饶师范学院,江西上饶334001

出　　处：《广东化工》2024年第16期230-232,共3页Guangdong Chemical Industry

基　　金：国家自然科学基金(22169017);江西省自然科学基金(20224BAB203026);江西省教育厅课题(GJJ201709,GJJ2201823)。

摘　　要：本文针对基于离子交换方法测定碘化铅溶度积常数实验时滴定终点的判定存在的问题进行了创新性改进,采用电子pH计替代传统的溴化百里酚蓝指示剂进行实验。经过对比实验研究表明:改进后的实验计算结果更精确,实验效率更高,实验稳定性得到了明显提升,有利于激发学生的科学创新精神,培养学生独立科研的动手能力,更适合作为典型本科无机化学实验室内的长期教学.In this paper,an innovative improvement was made to resolve the problems of titration endpoint determination for the determination of solubility product constant of lead iodide based on the ion exchange method.An electronic pH meter was used to replace the traditional thymol blue bromide indicator.Comparative experimental studies show that the improved experimental calculations are more accurate with higher efficiency and stability,which is conducive to stimulating the scientific innovation spirit of students,cultivating students'hands-on ability for independent scientific research,and is more suitable for long-term teaching as a typical experiment of undergraduate inorganic chemistry.

关 键 词：溶度积常数 碘化铅 滴定终点 离子交换法 电子pH计 

分 类 号：O6-32[理学—化学]