大学化学 >> 2022, Vol. 37 >> Issue (2): 2110029.doi: 10.3866/PKU.DXHX202110029

所属专题: 化学实验教学和管理

化学实验 上一篇    

“元素化学实验”中的“异常”现象(一)——Mn元素化学实验中的“异常”现象及其探析

阮婵姿, 董志强, 张春艳, 吕银云, 翁玉华, 潘蕊, 许振玲, 任艳平()   

  • 收稿日期:2021-10-12 录用日期:2021-11-29 发布日期:2021-12-13
  • 通讯作者: 任艳平 E-mail:ypren@xmu.du.cn
  • 作者简介:任艳平, Email: ypren@xmu.du.cn
  • 基金资助:
    2021年度教育部“基础学科拔尖学生培养计划2.0”研究课题(20212058);教育部2020年产学合作协同育人项目(202002060029);厦门大学教学改革研究项目(教材研究专项);厦门大学教学改革研究项目(JG20210904);首批国家级线下一流课程建设项目

"Abnormal" Phenomena in "Elemental Chemistry Experiments" (Ⅰ): Exploration and Analysis of the "Abnormal" Phenomena in Mn Elemental Chemistry Experiments

Chanzi Ruan, Zhiqiang Dong, Chunyan Zhang, Yinyun Lü, Yuhua Weng, Rui Pan, Zhenling Xu, Yanping Ren()   

  • Received:2021-10-12 Accepted:2021-11-29 Published:2021-12-13
  • Contact: Yanping Ren E-mail:ypren@xmu.du.cn

摘要:

大一学生在“元素化学实验”教学过程中,对反应条件如温度、催化剂、酸度、浓度或试剂用量等因素的影响考虑不周,可能出现某些实验现象和预想的或理论分析的结果不一致的“异常”现象。本文就学生在Mn元素化学实验过程中遇到的一些“异常”现象进行分析和总结,借助生动直观的演示实验,引导学生探究“异常”现象产生的可能原因和直观认识反应条件对反应结果的影响,培养学生的观察、分析、判断、归纳、推理和解决实际问题的能力。

关键词: Mn元素化学实验, 影响因素, 异常现象, 分析探究

Abstract:

In the teaching process of "elemental chemistry experiments", freshmen may have some "abnormal" experimental results that deviate from the expected results or theoretical analysis due to the lack of consideration of the effects of temperature, catalyst, acidity, concentration or reagent dosage. Herein, some "abnormal" phenomena encountered by students in Mn elemental chemistry experiments are analyzed and summarized. The vivid and intuitive experimental demonstrations guide students to explore the possible causes of "abnormal" phenomena, to intuitively understand the effect of reaction conditions on the outcome of the reaction and to cultivate the students' ability of observation, analysis, judgment, induction, reasoning, and practical problem-solving.

Key words: Mn elemental chemistry experiments, Affecting factors, Abnormal phenomenon, Analysis and exploration

MSC2000: 

  • G64