重铬酸钾法测定全铁含量的实验改进  

Experimental Improvement on Determination of Total Iron Content by Potassium Dichromate Method

作　　者：邓文芳 李海[1] 马铭 陈超[1] 朱效华[1] 黄思 方正法 DENG Wen-Fang;LI Hai;MA Ming;CHEN Chao;ZHU Xiao-Hua;HUANG Si;FANG Zheng-Fa(College of Chemistry and Chemical Engineering,Hunan Normal University,Changsha 410081,China;National Demonstration Center for Experimental Chemistry and Chemical Engineering Education,Hunan Normal University,Changsha 410081,China)

机构地区：[1]湖南师范大学化学化工学院,湖南长沙410081 [2]湖南师范大学化学化工国家级实验教学示范中心,湖南长沙410081

出　　处：《化学教育（中英文）》2023年第22期52-56,共5页Chinese Journal of Chemical Education

基　　金：2022年第二批教育部产学合作协同育人项目(220803893292434);湖南师范大学树达学院教学改革研究项目(院行发教务字[2022]35号)。

摘　　要：针对重铬酸钾滴定法测定全铁含量实验中的不足之处进行了改进,探索出一种基于SnCl_2-I_2-AgCl预处理的无汞测铁方法,改进后的实验涉及四大化学平衡理论知识,方法具有更好的重现性、环境友好、成本低,取得了良好的教学效果。In this paper, the deficiencies in the experiment of determining total iron content by potassium dichromate titration are improved, and a mercury-free iron determination method based on SnCl_2-I_2-AgCl pretreatment is explored. The improved experiment involves major knowledge of the four chemical equilibrium theories. The method has better reproducibility, environmental friendliness, low cost, and has achieved good teaching results.

关 键 词：重铬酸钾法 铁含量测定 无汞 

分 类 号：G63[文化科学—教育学]