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初中化学“酸和碱的性质”创意教学——探析食品发热包 被引量:2

Creative Teaching of“Properties of Acids and Bases”in Junior High School Chemistry:Analysis of Food Self-Heating Bag
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摘要 以食品发热包为主题情境,通过探析发热包成分、解密发热原理、计算原料配比、配制发热包等环节梳理酸和碱的性质、用途。从元素观、转化观的视角认识物质转化规律,体现物质研究的一般思路,凸显科学探究的基本过程。通过设计方案测定发热包中碳酸钠的含量,总结混合物成分鉴定及定量测定的方法;归纳气体定量测定的影响因素。呈现一堂学科观念、学科方法教学具体课例,凸显物质研究、定性检验、定量测定的基本方法。 This lesson takes food self-heating bag as the theme,reviews the properties and uses of acids and bases by analyzing the components of the self-heating bag,deciphering the heating principle,calculating the proportion of raw materials,preparing self-heating bags.From the perspective of transformation view and element view to understand the law of material transformation,the general ideas of material research and the basic process of scientific inquiry are highlighted and shown.The methods of composition identification and quantitative determination of the mixture are summarized through the design of experimental scheme to determine the content of sodium carbonate in the self-heating bag.The influencing factors of gas quantitative determination are summarized.This paper presents a specific teaching example of subject concept and subject method,and highlights the basic methods of material research,qualitative inspection and quantitative determination.
作者 任晓蒙 REN Xiao-Meng(Suzhou Wenchang Experimental Middle School,Suzhou 215151,China)
出处 《化学教育(中英文)》 CAS 北大核心 2022年第9期25-30,共6页 Chinese Journal of Chemical Education
基金 江苏省十三五规划重点资助课题“指向关键能力的初中化学创意课程实施研究”(E-a/2020/05)。
关键词 食品发热包 创意课程实施 酸碱复习 混合物成分鉴定 定量测定 food self-heating bag creative curriculum implementation review of acids and bases identification of mixture composition quantitative determination
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