摘要
针对钠与氧气反应教学中存在的不足,引入手持技术数字化创新实验,自主设计创新反应装置T形玻璃管以定量探究钠与氧气反应。本研究利用氧气传感器,通过测定密闭体系内氧气含量的变化,帮助学生基于四重表征模型、从定性和定量的角度认识钠与空气中的氧气在室温和加热条件下反应的区别;借助氧气、二氧化碳、湿度等3种传感器从定量的角度探究空气中的二氧化碳与水蒸气对钠的影响,形成对钠与氧气反应的科学认知。
Aiming at the shortcomings in the teaching of the reaction of sodium and oxygen,the digital innovation experiment of handheld technology was applied,and the T-shaped tube of the innovative reaction device was independently designed to quantitatively explore the reaction of sodium and oxygen.This study used an oxygen sensor to measure the changes in oxygen content in a closed system to help students understand the difference between sodium reacting with oxygen in the air from a qualitative and quantitative perspective based on the tetra-representation model at room temperature and heating conditions.The oxygen,carbon dioxide and humidity sensors were used to explore the influence of carbon dioxide and water vapor in the air on sodium from a quantitative perspective,forming a scientific understanding of the reaction of sodium and oxygen.
作者
陈德成
钱扬义
黄倩莹
林惠梅
CHEN De-Cheng;QIAN Yang-Yi;HUANG Qian-Ying;LIN Hui-Mei(School of Chemistry,South China Normal University,Guangzhou 510006,China;Guangdong Zhongyuan Middle School,Guangzhou 511400,China)
出处
《化学教育（中英文）》
CAS
北大核心
2022年第9期76-85,共10页
Chinese Journal of Chemical Education
基金
2020年广东省研究生教育创新计划研究生示范课程建设项目“化学实验设计与研究(手持技术)”(编号:2020SFKC023)
2020年广东省高等教育教学改革项目“化学卓越教师实验教学创新能力的‘四联动’培养范式——以教育部东芝杯全国师范大学化学教学创新大赛获奖作品为例”。
关键词
钠与氧气反应
手持技术
T形玻璃管
定量
四重表征
reaction of sodium and oxygen
hand-held technology
T-shaped tube
quantitative
tetra-representation
