高中化学项目教学案例——探寻柠檬水中的维生素C

High School Chemistry Project Teaching:Assaying Vitamin C in the Lemoade

选取"维生素C"这一生活中常见的还原性物质,面向已经学习"氧化还原反应"基础知识的高一年级学生开展项目教学活动。通过提出项目问题、师生共同拆解项目问题设计研究方案和子任务、学生实施子任务研究等项目教学环节,在形成相应子任务成果的同时,进一步帮助学生巩固从氧化性和还原性视角认识化学物质性质的认识角度,建立基于物质性质定量分析目标物质含量的实验思路和思维框架,提升学生对于氧化还原反应功能和价值的认识。

This teaching case is an example of project teaching and learning activity based on the reducibility of vitamin C for the grade 1 students in high school who has learned the basic knowledge of redox reaction.Firstly,the project issue is raised by the teacher and students design the plan of solving it which is devided into several sub research tasks through the guide of teacher.Then,students carry out their sub research tasks to assaying the vitamin C in the lemoade.The project is aimed at strengthening the thought anagle of material’s oxidability and reducibility,building the experiment thought of assaying the target molecule or other chemical materials,enhancing the know of the functions and values of redox reaction.