Scholarlink

<p>In this paper, the mean activity coefficients of potassium chloride (KCl) in the ternary electrolyte system KCl–KSCN–H₂O are determined potentiometrically at 298.15 ± 0.1 K over a total ionic strength range of 0.0017–2.0000 mol·kg⁻<sup>1</sup>. A liquid-junction-free galvanic cell is employed to obtain precise measurements. Systematic variations in ionic strength and salt molal ratios are implemented to investigate ion–ion interactions and the resulting thermodynamic properties, including osmotic coefficients and excess Gibbs free energies. The experimental data are analyzed using the Pitzer ion interaction model and the Harned rule. Mixing parameters (θ<sub>ClSCN</sub>, ψ<sub>KClSCN</sub>) are evaluated via the Pitzer graphical method and Harned interaction coefficients are determined graphically. Both models provided an accurate description of ionic interactions and thermodynamic behavior in the ternary system. The findings of this research contribute to a deeper understanding of the thermodynamic properties of mixed electrolyte solutions, with implications for various chemical and industrial applications.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Potentiometric Measurements and Modeling of Mean Activity Coefficients of Ternary Electrolyte (KCl + KSCN + H2O) Solution at T = 298.15 ± 0.1 K

  • 期刊论文

  • 发表日期：

    2026年1月12日

查看全文
  • Mohammad Ali Bagherinia

摘要

In this paper, the mean activity coefficients of potassium chloride (KCl) in the ternary electrolyte system KCl–KSCN–H₂O are determined potentiometrically at 298.15 ± 0.1 K over a total ionic strength range of 0.0017–2.0000 mol·kg⁻1. A liquid-junction-free galvanic cell is employed to obtain precise measurements. Systematic variations in ionic strength and salt molal ratios are implemented to investigate ion–ion interactions and the resulting thermodynamic properties, including osmotic coefficients and excess Gibbs free energies. The experimental data are analyzed using the Pitzer ion interaction model and the Harned rule. Mixing parameters (θClSCN, ψKClSCN) are evaluated via the Pitzer graphical method and Harned interaction coefficients are determined graphically. Both models provided an accurate description of ionic interactions and thermodynamic behavior in the ternary system. The findings of this research contribute to a deeper understanding of the thermodynamic properties of mixed electrolyte solutions, with implications for various chemical and industrial applications.