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What is ionic mobility?
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The average velocity with which a given ion drifts through a specified medium under the influence of an electric field is called ionic mobility.
Aug 29, 2023 · The motion of the ion itself can be characterized by charge, shape, and size. The ion moves through the medium and migrates with a characteristic velocity, which is in turn dependent on the characteristics of the ion itself and the properties of the medium. This phenomenon is called electrophoresis.
Ionic mobility refers to the measure of how quickly an ion moves through a medium, typically a solution or solid, when an electric field is applied. This concept is crucial in understanding the behavior of electrolytes and their ability to conduct electricity, as ions with higher mobility contribute more significantly to ionic conductivity.
- Measured ion mobilities
- 6 πη r
- Electrochemical cells
- electrode compartment
- Reactions at electrodes: Half-reactions
⇒ u is high for an ion that is: highly charged in a solution of low viscosity of small radius r Special case H+: Grotthus conduction mechanism u = ez
BUT: r = hydrodynamic radius (including water ligands)
= electronic conductor + surrounding If two different electrolytes are used: electrolyte
Galvanic cell: electrochemical cell in which electricity is produced as a result of a spontaneous reaction (e.g., fuel cells, electric fish!) Electrolytic cell: electrochemical cell in which a non-spontaneous reaction is driven by an external source of current
Redox reactions: Reactions in which electrons are transferred from one species to another E.g.,
- 165KB
- 5
Ionic mobility refers to the ability of ions to move through a solid material when an electric field is applied. This movement is crucial for ionic conduction in solid-state materials, affecting how efficiently these materials can transport charge.
Nov 11, 2021 · Ion mobility spectrometry is increasingly often coupled to mass spectrometry measurements, either for separation purposes or to assist compound identification. This chapter introduces basic definitions and concepts underlying ion mobility spectrometry.
Electrical mobility is the ability of charged particles (such as electrons or protons) to move through a medium in response to an electric field that is pulling them. The separation of ions according to their mobility in gas phase is called ion mobility spectrometry, in liquid phase it is called electrophoresis.
