In this work, we report an investigation of electrical impedance behavior of dilute aqueous solutions of potassium chloride KCl_(aq) and sodium chloride NaCl_(aq) (0.1 to 0.7 mMol/L) in the frequencies ranging from 10.0 mHz to 10.0 MHz. The real and imaginary parts of the complex electrical impedance are obtained by using the Electrical Impedance Spectroscopy (EIS) technique. The amplitude of the AC applied voltage is 20.0 mV. The complex electrical impedance results of the solutions are modeled by using an equivalent electrical circuit with a good agreement with the experimental data. This proposed circuit is composed by three sections connected in series. The first one is composed by a parallel RC associated with bulk effects, the second section is composed by a capacitor in parallel to a constant phase element (CPE) associated with the electric double-layer and the last one section composed by a resistance in series with an inductor associated with resistances of the electrical contacts and with parasites inductances of the connected cables. The components of the equivalent circuit are investigated as a function of salt concentration. As additional results, the electrical conductivity and complex permittivity of the samples are calculated and the electrical properties of the solutions are investigated as a function of kind of cations. For both K⁺ and Na⁺ cations, the bulk effects are well described by Debye model. However, the electric double-layer shows a higher resistance associated with cation Na⁺ than that associated to cation K⁺. Even for very low concentrations of salt, for both salts, it was observed an inverse relationship between impedance and salt concentration.

在这项工作中，我们报告了对氯化钾KCl _（aq）和氯化钠NaCl _（aq）的稀水溶液的电阻抗行为的研究。（0.1至0.7 mMol / L）在10.0 mHz至10.0 MHz的频率范围内。复数电阻抗的实部和虚部通过使用电阻抗谱（EIS）技术获得。交流施加电压的幅度为20.0 mV。解决方案的复数电阻抗结果通过使用与实验数据吻合良好的等效电路进行建模。所提出的电路由串联的三个部分组成。第一个由与批量效果相关联的并行RC组成，第二部分由与恒压元件（CPE）并联的电容器组成，该电容器与双电层相关，而最后一个部分由电阻与电感器串联组成，该电感器与电触点的电阻和寄生电感相关连接的电缆。研究了等效电路的组成与盐浓度的关系。作为附加结果，计算了样品的电导率和复介电常数，并根据阳离子种类对溶液的电性能进行了研究。对于两个K 计算样品的电导率和复介电常数，并根据阳离子种类对溶液的电学性质进行研究。对于两个K 计算样品的电导率和复介电常数，并根据阳离子种类对溶液的电学性质进行研究。对于两个K⁺和Na ⁺阳离子，其整体效应由Debye模型很好地描述。然而，双电层显示出与阳离子Na ⁺相关的电阻高于与阳离子K ⁺相关的电阻。即使对于非常低的盐浓度，对于两种盐，都可以观察到阻抗与盐浓度之间的反比关系。