摘要
以NH;的检验为主要内容,开展纸笔测验,采用描述统计、差异分析,从操作描述、化学用语以及原理理解等3个方面入手了解高一学生物质检验内容的学习情况,分析性别及班级水平差异,发现学生在物质检验题作答时存在的主要问题。结果显示,大部分学生无法完整规范地描述物质检验的基本方法和书写对应的化学反应方程式,同时,没有深入了解物质检验过程涉及的化学原理;虽然男女生、不同班级水平学生在各方面均存在显著差异,但效应作用较小且存在许多共性问题,如忽略取样步骤、混淆检验方法、错误理解物质性质和化学原理等。本研究为中学化学实验,特别是物质检验部分的教学提供了建议和启示。
The study is to diagnose the senior one students’knowledge of substance test in chemistry experiments and conclude the common problems.The participants come from a key high school in Zhejiang province.Ammonium ion test is the main content,including operation description,chemical terminology and mechanism understanding.Meanwhile,the differences in gender and class level are also considered,based on variance analysis.The results indicate that most of the students could not describe the experimental operation of substance test and write the corresponding chemical reaction equations,completely and accurately.What’s more,they don’t really understand the underlying chemistry theories.Although significant differences in gender and class level are found and the effect sizes are both limited,there are still many common problems,such as ignoring sampling and heating,confusing testing methods and misunderstanding the substance properties and chemistry mechanisms.The study provides some suggestions and implications for the teaching of chemical experiment,especially substance test.
作者
杨希
竺丽英
王祖浩
YANG Xi;ZHU Li-Ying;WANG Zu-Hao(College of Teacher Education,East China Normal University,Shanghai 200062,China;College of Teacher Education,Zhejiang Normal University,Jinhua 321004,China)
出处
《化学教育(中英文)》
CAS
北大核心
2022年第1期14-20,共7页
Chinese Journal of Chemical Education
关键词
高一学生
实验教学
物质检验
问题诊断
铵根离子的检验
senior one students
experiment teaching
substance test
problem diagnosis
test of ammonium ion