大学化学 >> 2020, Vol. 35 >> Issue (1): 64-69.doi: 10.3866/PKU.DXHX201905028

化学实验 上一篇    下一篇

[Co(NH3)6]Cl3实验中制备条件对配合物形成影响的讨论

魏灵灵1,张可嘉2,李淑妮1,*()   

  1. 1 陕西师范大学化学化工学院, 西安 710119
    2 陕西师范大学基础实验教学中心, 西安 710062
  • 收稿日期:2019-05-08 录用日期:2019-06-20 发布日期:2019-07-01
  • 通讯作者: 李淑妮 E-mail:lishuni@snnu.edu.cn

Influence of Preparation Conditions on the Composition of Cobalt (Ⅲ) Ammine Complexes

Lingling Wei1,Kejia Zhang2,Shuni Li1,*()   

  1. 1 School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, P. R. China
    2 Basic Experimental Teaching Center, Shaanxi Normal University, Xi'an 710062, P. R. China
  • Received:2019-05-08 Accepted:2019-06-20 Published:2019-07-01
  • Contact: Shuni Li E-mail:lishuni@snnu.edu.cn

RichHTML

26

PDF

1338

赞

摘要：

针对[Co（NH3）6]Cl3制备实验中，反应条件不同会导致生成具有不同组成的Co(Ⅲ)氨配合物这一问题，系统探讨了制备过程中在配体NH3、Cl-和H2O共存时，[Co（NH3）6]Cl3、[Co（NH3）5Cl]Cl2和[Co（NH3）5（H2O）]Cl3这三种Co(Ⅲ)氨配合物的生成条件和稳定性。通过对比分析各自的形成过程和制备条件，将化学原理应用于解释实验现象，可培养学生结合理论知识对实验案例进行对比分析的探究能力。

关键词: 基础无机化学实验, Co(Ⅲ)氨配合物, 案例分析, 深刻认识, 制备条件

Abstract:

The preparation of hexamine cobalt (Ⅲ) chloride is an important basic experiment in inorganic chemistry laboratory. During the preparation process, the change of reaction conditions can easily alter the composition of cobalt(Ⅲ) complexes. In order to help teachers and students better understand and establish the relationship among the experimental preparation conditions, the compositions, and the stability of different complexes, [Co(NH3)6]Cl3, [Co(NH3)5Cl]Cl2and[Co(NH3)5(H2O)]Cl3 complexes were prepared and studied. Through comparing their respective formation processes and preparation conditions, we could think deeply and apply basic chemical principles in discussing the experimental phenomenon, so as to stimulate students' research interest and cultivate their scientific research abilities.

Key words: Basic inorganic chemistry laboratory, Cobalt (Ⅲ) ammine complexes, Case analysis, Profound understanding, Preparation conditions