基于“科学探究与创新意识”的化学实验设计——以质量差法测定咖啡中碳酸氢钠含量为例  

Chemical Experiment Design Based on“Scientific Inquiry and Innovation Consciousness”:Taking the Determination of Sodium Bicarbonate in Coffee by Mass Difference Method as an Example

作　　者：马怀蕊 王建坤 杨艳华 杨春香 李曼弯 Ma Huairui;Wang Jiankun;Yang Yanhua;Yang Chunxiang;Li Manwang(School of Chemistry and Chemical Engineering,Kunming University,Kunming 650214,China;Diqing Tibetan Autonomous Prefecture Ethnic Middle School,Shangri-La 674499,China;NO.1 Senior High School of Mengzi,Mengzi 661100,China)

机构地区：[1]昆明学院化学化工学院,云南昆明650214 [2]迪庆藏族自治州民族中学,云南香格里拉674499 [3]蒙自市第一高级中学,云南蒙自661100

出　　处：《云南化工》2022年第8期56-57,65,共3页Yunnan Chemical Technology

基　　金：云南省化学一流本科专业建设项目;云南省科技厅基础研究专项青年项目(202101AU070060);云南省大学生创新创业训练计划项目(202111393026);昆明学院引进人才科研项目(YJL2008);2022年昆明学院课程思政示范课建设项目——中学化学教材分析与教学设计成果;昆明学院化学化工学院科研促进本科实验教学改革研究成果;蒙自市教育科研课题研究“十四五”规划课题项目(202117)。

摘　　要：在化学探究式教学中,通常采用滴定法和抽气法测定饮品中的二氧化碳含量,但此类方法不适合定量测定颜色较深饮品物质含量。以一款市售即溶咖啡饮品为例,通过加热的方式,采用质量差法定量测定其碳酸氢钠的含量,并通过对照组计算实验的相对误差。实验不仅对颜色较深饮品中物质含量的测定提供参考,而且对开展物质定量测定实验教学具有一定的教学价值,是培养学生科学探究与创新意识化学学科素心素养的体现。In chemistry inquiry teaching,titration and air extraction methods are usually used to determine the content of carbon dioxide in drinks,but these methods are not suitable for quantitative determination of the content of dark drinks.Taking a commercial instant coffee drink as an example,the content of sodium bicarbonate was quantitatively determined by mass difference method by heating,and the relative error of the experiment was calculated by the control group.This experiment not only provides a reference for the determination of substance content in dark drinks,but also has a certain teaching value for the experimental teaching of quantitative determination of substances.It is the embodiment of cultivating students' awareness of scientific exploration and innovation and the simple quality of chemistry.

关 键 词：咖啡 碳酸氢钠 差量法 含量测定 

分 类 号：G642.423[文化科学—高等教育学]