有限条件下的综合化学实验探索——以高纯度硫酸钡的制备与验纯为例  

Exploration of Integrated Chemistry Experiments under Limited Conditions——Preparation and Purification of High Purity Barium Sulphate as an Example

作　　者：李慧妍 Li Huiyan(Jiangsu Second Normal University,College of Life Science and Chemistry,Nanjing 211200,China)

机构地区：[1]江苏第二师范学院生命科学与化学化工学院,江苏南京211200

出　　处：《广东化工》2023年第22期178-180,共3页Guangdong Chemical Industry

基　　金：江苏第二师范学院“学校高层次人才科研启动基金”(927301)。

摘　　要：综合化学实验是为高年级学生开设的一门必修实验课,其至少包含了两门以上的化学主干课程的基本知识。基于锻炼学生科研能力的目的,所使用的实验方法往往较为复杂,需要用到大型先进仪器,而这些是偏远落后地区的高校所缺乏的。本文介绍了一种综合了无机制备与物理化学方法验纯的综合化学实验,通过对高纯度硫酸钡的制备与通过测量电导率验纯,锻炼了学生的实验制备技能以及处理数据的能力。同时此实验还具有拓展性,有条件的高校可以根据自己学校的仪器储备,对两种平行制备方法所得的硫酸钡进行分析,探究其制备纯度不同的原因。Integrated Chemistry Experiments is a compulsory laboratory course for senior students,which includes the basic knowledge of at least two main chemistry courses.The experimental methods used are often complex and require the use of large advanced instruments,which are lacking in universities in remote and backward areas,for the purpose of exercising students'research skills.This paper presents a comprehensive chemistry experiment combining inorganic preparation and physical chemistry methods to test the purity of high purity barium sulphate by preparation and measurement of electrical conductivity,and to develop students'experimental preparation skills and data handling abilities.The experiment is also extended to allow universities to analyse the barium sulphate obtained by the two parallel preparation methods and to investigate the reasons for the differences in purity of the preparations,depending on the availability of instruments in their own schools.

关 键 词：综合化学实验 硫酸钡 电导率 络合法 微乳液法 

分 类 号：TQ[化学工程]