摘要
数字化手持技术实验因具有简单便携、易操作、数据实时等优点,在中学化学教学中已经成为一种创新的教学工具,有助于学生化学概念的学习及认知水平的发展.基于数字化手持技术,在考虑了反应吸、放热影响的基础下,利用气压传感器探究了盐酸浓度对Mg与盐酸反应的反应速率的影响,同时考察了催化剂FeCl_(3)用量、温度对H_(2)O_(2)分解反应速率的影响.反应体系“压强-时间”曲线及反应速率的直接对比,利于学生深刻理解反应物浓度、催化剂用量、温度对化学反应速率的影响.
With the advantages of simplicity,portability,easy operation and real-time data presentation,the digital hand-held technology experiments has become an innovative teaching tool of the chemistry classroom in secondary schools.It is helpful for students to learn chemical concepts and develop their cognitive level.Based on the digital experiment of hand-held technology,this work adopted gas pressure sensor to explore the effect of HCl concentration on the rate of reaction between hydrochloric acid and magnesium,as well as the effect of dosage of FeCl_(3)catalyst and temperature on the decomposition rate of hydrogen peroxide.Since reaction is endothermic or exothermic,effect of heat has been considered along the whole process.The obtained“pressure-time”curves and the calculated reaction rates would offer directly comparison,thus leading to an easy understanding of the influence of reactant concentration,catalyst,and temperature on reaction rate.
作者
徐先燕
郑灵丹
周慧颖
张梓淇
刘素晶
陈洁
XU Xianyan;ZHENG Lingdan;ZHOU Huiying;ZHANG Ziqi;LIU Sujing;CHEN Jie(School of Chemistry&Civil Engineering,Shaoguan University,Shaoguan 512005,Guangdong,China)
出处
《韶关学院学报》
2024年第3期98-102,共5页
Journal of Shaoguan University
基金
韶关市哲学社会科学规划项目(G2020024)
韶关市社会发展科技协同创新体系建设项目(230330098033905)。
关键词
数字化手持技术实验
化学反应速率
气压传感器
digital hand-held technology experiments
chemical reaction rate
gas pressure sensor
