大学化学 >> 2016, Vol. 31 >> Issue (3): 82-84.doi: 10.3866/PKU.DXHX20160382

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液体接界电势公式分析

胡光辉*(),潘湛昌   

  • 发布日期:2016-04-06
  • 通讯作者: 胡光辉 E-mail:qhxy123@126.com
  • 基金资助:
    2014年广东省"质量工程"建设项目(ZYGX012)

Analysis of the Formula of Liquid Junction Potential

Guang-Hui HU*(),Zhan-Chang PAN   

  • Published:2016-04-06
  • Contact: Guang-Hui HU E-mail:qhxy123@126.com
  • Supported by:
    2014年广东省"质量工程"建设项目(ZYGX012)

摘要:

以不同浓度的硝酸银接触为例,讨论了液体接界电势产生的原因,阐明了正负离子迁移的吉布斯总能量变化与过剩电荷的吉布斯能量差异,推导了液体接界电势的计算公式,并说明了液体接界电势与电势正负侧的活度比关系。

关键词: 液体接界电势, 硝酸银, 化学势, 电荷过剩, 吉布斯函数

Abstract:

In this paper, the cause of liquid junction potential was analyzed with example of two different concentrations of silver nitrate. Here, we point out the difference between the total Gibbs energy and the excess charge Gibbs energy and deduce the formula of liquid junction potential. At last, the relationship between liquid junction potential and activity ratio is discussed.

Key words: Liquid junction potential, Silver nitrate, Chemical potential, Excess charge, Gibbs energy

MSC2000: 

  • O6