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Related Concept Videos

Electrolyte and Nonelectrolyte Solutions02:21

Electrolyte and Nonelectrolyte Solutions

Substances that undergo either a physical or a chemical change in solution to yield ions that can conduct electricity are called electrolytes. If a substance yields ions in solution, that is, if the compound undergoes 100% dissociation, then the substance is a strong electrolyte. Complete dissociation is indicated by a single forward arrow. For example, water-soluble ionic compounds like sodium chloride dissociate into sodium cations and chloride anions in aqueous solution.
Dielectric Polarization in a Capacitor01:31

Dielectric Polarization in a Capacitor

The presence of a dielectric medium in a capacitor not only changes the voltage and capacitance but also affects the electric field. In general, dielectrics can be of two types: polar and nonpolar. In a polar dielectric, the positive and negative charges in the molecules are separated by a distance and hence have a permanent dipole moment. In contrast, no such charge separation exists in a nonpolar dielectric, however the nonpolar molecules get polarized in the presence of an external electric...
Potential Due to a Polarized Object01:29

Potential Due to a Polarized Object

A neutral atom consists of a positively charged nucleus surrounded by a negatively charged electron cloud. When placed in an external electric field, the external electric force pulls the electrons and nucleus apart, opposite to the intrinsic attraction between the nucleus and the electrons. The opposing forces balance each other with a slight shift between the center of masses of the nucleus and the electron cloud, resulting in a polarized atom. On the other hand, a few molecules, like water,...
The Debye–Hückel Theory of Electrolyte Solutions01:27

The Debye–Hückel Theory of Electrolyte Solutions

The Debye–Hückel theory, established by Peter Debye and Erich Hückel in 1923, is a fundamental concept in physical chemistry. It provides an understanding of the behavior of strong electrolytes in solution, particularly explaining their deviations from ideal behavior.The theory is based on Coulombic interactions (the attraction or repulsion between charged particles) between ions in solution. In an ionic solution, oppositely charged ions tend to attract each other. This means that cations...
Theory of Strong Electrolytes01:23

Theory of Strong Electrolytes

The interionic forces of the strong electrolytes depend on the solvent's dielectric constant, which is the ability of a solvent to store electrical energy, based on its polarizability. and the solution's concentration. In high-dielectric solvents and in dilute solutions, weak electrostatic forces keep ions apart. However, in low-dielectric solvents or concentrated solutions, stronger interionic forces may cause ions to pair up as ionic doublets despite being fully ionized. The theory of strong...
The Electrical Double Layer01:30

The Electrical Double Layer

In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...

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Related Experiment Video

Updated: Jul 18, 2026

Dissolution Dynamic Nuclear Polarization Instrumentation for Real-time Enzymatic Reaction Rate Measurements by NMR
10:54

Dissolution Dynamic Nuclear Polarization Instrumentation for Real-time Enzymatic Reaction Rate Measurements by NMR

Published on: February 23, 2016

Kinetic polarization deficiency in electrolyte solutions.

J B Hubbard, L Onsager, W M van Beek

    Proceedings of the National Academy of Sciences of the United States of America
    |February 1, 1977
    PubMed
    Summary

    Researchers discovered a new kinetic effect in electrolyte solutions called kinetic polarization deficiency. This phenomenon reduces solution permittivity, impacting ion migration and electrical field interactions.

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    Published on: February 23, 2016

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    Generation and Control of Electrohydrodynamic Flows in Aqueous Electrolyte Solutions
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    Generation and Control of Electrohydrodynamic Flows in Aqueous Electrolyte Solutions

    Published on: September 7, 2018

    Area of Science:

    • Physical Chemistry
    • Electrochemistry
    • Solution Physics

    Background:

    • Electrolyte solutions exhibit complex behaviors influenced by ion-solvent interactions.
    • Understanding the dynamic response of solvent permittivity to ion movement is crucial for electrochemical applications.

    Purpose of the Study:

    • To predict and experimentally confirm a novel kinetic effect in electrolyte solutions.
    • To characterize the phenomenon of kinetic polarization deficiency and its relationship with solution properties.

    Main Methods:

    • Theoretical prediction of kinetic polarization deficiency.
    • Experimental validation using electrolyte solutions.
    • Analysis of ion migration, hydrodynamic rotation, and dielectric relaxation dynamics.

    Main Results:

    • Identified kinetic polarization deficiency as a reduction in static permittivity of electrolyte solutions compared to pure solvents.
    • Demonstrated that the permittivity decrease is proportional to the product of solvent dielectric relaxation time and low-frequency conductivity.
    • Elucidated the dual role of kinetic ion-solvent interactions in affecting capacitive admittance via hydrodynamic and dielectric relaxation processes.

    Conclusions:

    • The study presents compelling evidence for a previously unrecognized kinetic effect in electrolyte solutions.
    • Kinetic polarization deficiency significantly influences the electrical response of electrolyte solutions, particularly under dynamic conditions.
    • Findings provide new insights into the fundamental physics of ion-solvent interactions and their impact on electrochemical systems.