ACTIVITY COEFFICIENTS IN MIXED - ELECTROLYTE SOLUTION OF NaBr - NaAc - H_2O SYSTEM

闫卫东; 刘卫东; 韩世钧; 尤笑梅

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ACTIVITY COEFFICIENTS IN MIXED - ELECTROLYTE SOLUTION OF NaBr - NaAc - H_2O SYSTEM

更新时间：2025-12-16

- ACTIVITY COEFFICIENTS IN MIXED - ELECTROLYTE SOLUTION OF NaBr - NaAc - H_2O SYSTEM
- CIESC Journal Issue 6, (1993)
- 作者机构：
  
  浙江大学化学系,浙江大学化学系,浙江大学化学系,浙江大学化学系杭州310027,杭州310027,杭州310027,杭州,310027
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：25 December 1993，
  
  Published：25 December 1993
- 稿件说明：
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闫卫东, 刘卫东, 韩世钧, et al. ACTIVITY COEFFICIENTS IN MIXED - ELECTROLYTE SOLUTION OF NaBr - NaAc - H_2O SYSTEM[J]. CIESC Journal, 1993, (6).
DOI：

闫卫东, 刘卫东, 韩世钧, et al. ACTIVITY COEFFICIENTS IN MIXED - ELECTROLYTE SOLUTION OF NaBr - NaAc - H_2O SYSTEM[J]. CIESC Journal, 1993, (6). DOI：

摘要

用电势法测定了298.15K以及I为0.1、0.5、1.0、1.5、2.0、2.5和3.0 mol/kg时

NaBr在混合电解质溶液NaBr+NaAc+H_2O中的活度系数.实验结果用Harned、SRJ和Pitzer方程拟合

得到各种方程的相互作用参数

由拟合的标准偏差得知

Pitzer方程的拟合精度略好于前2个方程.用Pitzer混合参数θ_(Br-Ac)和ψ_(Br-Na-Ac)计算了NaAc在该混合体系中的活度系数和体系的过量Gibbs自由能.

Abstract

The activity coefficients of NaBr in the system NaBr - NaAc - H_2O at 298. 15K were determined from EMF measurements at constant total ionic strengths of 0. 1

0. 5

1. 0

1. 5

2. 0

2. 5 and 3. 0 mol/kg. At each total ionic strength studied the measurements were carried out at different ratios of the NaAc to NaBr ionic strengths. The experimental activity coefficients were fitted by using the Harned equation

Scatchard equation and Pitzer equation. Although all these models can be successfully applied to the analysis of this system

the Pitzer equation leads to better fitting than the others. Finally

the excess Gibbs free energy of these mixtures was also calculated.

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