“电离与离子反应”的单元教学设计与实施——食盐精制:从微观角度看粗盐中可溶性杂质的去除  

Unit Teaching Design and Implementation of “Ionization and Ion Reaction”:From the Microscopic Perspective of the Removal of Soluble Impurities in Coarse Salt

作　　者：胡久华[1] 董娜 陈颖[2] 尹博远[2] 庞雪[3] 金雅娟 HU Jiu-Hua;DONG Na;CHEN Ying;YIN Bo-Yuan;PANG Xue;JIN Ya-Juan(College of Chemistry,Beijing Normal University,Beijing 100875,China;Beijing Haidian Teachers Training College,Beijing 100195,China;Beijing Bayi School,Beijing 100080,China)

机构地区：[1]北京师范大学化学学院,北京100875 [2]北京市海淀区教师进修学校,北京100195 [3]北京市八一学校,北京100080

出　　处：《化学教育（中英文）》2021年第19期23-29,共7页Chinese Journal of Chemical Education

基　　金：北京市教育科学“十三五”规划2019年度一般课题“核心素养导向的高中化学深度学习教学改进区域实践研究”(CDDB19221);教育部基础教育课程教材发展中心、课程教材研究所深度学习教学改进项目。

摘　　要：在"食盐精制:从微观角度看粗盐中可溶性杂质的去除"的单元教学中,通过初识粗盐中的杂质、微观角度看氯化钠、微观角度看粗盐溶液、微观角度认识除杂方法、设计除杂方案并实施等活动,促进学生理解与应用电离、离子反应等核心概念,引领学生解决真实问题,形成解决除杂实验问题的基本思路,实现能力素养的发展。经过多轮次教学改进,结合教学实践及其教学效果抽提出"聚焦核心概念和学生必做实验,实现认识能力的进阶与实际问题解决过程高度融合""通过学科实践及实验探究,建立宏观、微观、符号关联,突出证据推理,构建思维模型""通过持续性评价活动,外显学生的前概念,促进概念转变,形成化学学科思维方式"等教学策略。In the "refined salt: from the micro perspective of the removal of soluble impurities in coarse salt"of unit teaching, through the initial knowledge of the impurity in the coarse salt, from the microscopic perspective of sodium chloride, coarse salt solution, and the removal of impurities, and designing scheme and implementation of activities in removing impurity promote students’ understanding and application of core concepts, such as ionization, ionic reaction, leading the students to solve real problems, to form the basic train of thought to solve the problem of removing impurity experiment, realize the ability of literacy development. After many rounds of teaching improvement, combined with teaching practice and the teaching effect to put forward "focus on the core concepts and students will be doing the experiment, and realizes the cognition of the advanced and practical problem solving process fusion""through practice and experiments to explore, to establish a link between macro and micro, symbols, and highlight the evidential reasoning and build a model of thinking"" through continual evaluation activity, explicit concept before students, promote the concept of change, be chemical science thinking mode" and other teaching strategies.

关 键 词：电离与离子反应 单元教学 食盐精制 教学策略 

分 类 号：G633.8[文化科学—教育学]