大学化学 >> 2018, Vol. 33 >> Issue (10): 105-109.doi: 10.3866/PKU.DXHX201802006

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分析化学有效数字教学中常见问题及分析

刘海燕*(),赵怡,胡坪,钱俊红,张文清   

  • 收稿日期:2018-02-04 发布日期:2018-11-01
  • 通讯作者: 刘海燕 E-mail:hyliu@ecust.edu.cn
  • 基金资助:
    华东理工大学基础课程教学团队建设项目(YJ0126123);谱学导论上海市重点课程;华东理工大学专业核心课程项目

Frequently Encountered Problems and Analysis of Significant Figures Teaching in Analytical Chemistry

Haiyan LIU*(),Yi ZHAO,Ping HU,Junhong QIAN,Wenqing ZHANG   

  • Received:2018-02-04 Published:2018-11-01
  • Contact: Haiyan LIU E-mail:hyliu@ecust.edu.cn
  • Supported by:
    华东理工大学基础课程教学团队建设项目(YJ0126123);谱学导论上海市重点课程;华东理工大学专业核心课程项目

摘要:

分析化学往往会涉及大量的实验数据,能否对这些原始数据进行正确的记录及运算,关系到实验结果的可靠性及准确度。本文从有效数字的重要性出发,针对教学过程中发现的与有效数字有关的常见问题,进行了深入分析,指出了解决方法,力图帮助学生学习和掌握有效数字的概念、数值修约、运算规则和数据处理能力。

关键词: 有效数字, 数据记录, 数值修约, 数据处理

Abstract:

Analytical chemistry often involves a large amount of experimental data, and the reliability and accuracy of the experimental results are related to whether the original data can be properly recorded and calculated. In this paper, starting from the importance of significant figures, analyzing the frequently encountered problems related to the significant figures in teaching process, and giving some solutions, we try to help students to learn and master the concept of significant figures, rounding off numerical values, rule of operation and data processing.

Key words: Significant figures, Data recording, Rounding, Data processing

MSC2000: 

  • G64