探究真实化学工艺流程的实验设计——电解饱和食盐水  

Experimental Design of Real Chemical Process:Electrolysis of Saturated Sodium Chloride Solution

作　　者：汪兵兵 胡艳丽 饶玉流 许沁杨 WANG Bing-Bing;HU Yan-Li;RAO Yu-Liu;XU Qin-Yang(Tongcheng No.8 Middle School New Campus,Anqing 231400,China;Teaching Research Office of Tongcheng Education Bureau,Anqing 231404,China;Teaching Research Office of Anqing Education Bureau,Anqing 246008,China;Tongcheng High School of Anhui Province,Anqing 231403,China)

机构地区：[1]桐城市第八中学新校区,安徽安庆231400 [2]桐城市教育局教学研究室,安徽安庆231404 [3]安庆市教育局教学研究室,安徽安庆246008 [4]安徽省桐城中学,安徽安庆231403

出　　处：《化学教育(中英文)》2025年第7期70-74,共5页Chinese Journal of Chemical Education

基　　金：安庆市2022年教育科学规划研究课题“三新背景下高一衔接期化学教学研究”(AJKT2022-112);安庆市直教体系统第十批教育内涵项目“高中化学基于素养导向促进学生深度学习的单元活动设计与实施研究”;2024年度安庆市教育技术研究课题“希沃技术在高中学科教学中的应用研究”(AQE202217)。

摘　　要：以“探究海水淡化电渗析法”为主线,选用饱和食盐水作为海水的替代品进行电解实验,以紫甘蓝为统一的指示剂,自制教具渐进式地从无膜到多室多膜电解饱和食盐水,来探析海水淡化电渗析法的工作原理、装置设计、“膜”的保养及优化,帮助学生体会到电解知识在真实工业中的应用。电解过程中不同电解室溶液颜色均呈现不同的颜色指示,不同电解室之间颜色的动态过渡和渐变,均能有效帮助学生明晰不同电解室的pH变化、离子移动和电极反应情况,同时弥补了教材中缺少多室多膜电解池电解实验的空白。With"exploring electrodialysis method for seawater desalination"as the main line,saturated salt water was selected as a substitute for seawater for electrolysis experiment.Purple cabbage was used as a unified indicator,and self-made teaching aid was gradually developed from membrane free to multi-cell and multi-membrane electrolysis of saturated salt water to explore the working principle,device design,maintenance and optimization of"membrane"of seawater desalination electrodialysis method.Help students to build a systematic analysis model of electrolytic cell,and experience the application of electrolytic knowledge in real industry.In the process of electrolysis,the color of solution in different electrolytic chambers presents different color indicators,and the dynamic transition and gradual change of color between different electrolytic chambers can effectively help students understand the pH change,ion movement and electrode reaction of different electrolytic chambers,and at the same time make up the blank of the lack of multi-cell and multi-film electrolytic cell electrolysis experiment in the textbook.

关 键 词：海水淡化 电渗析 电解池 离子交换膜 

分 类 号：G633.8[文化科学—教育学]