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Related Concept Videos

Aqueous Solutions and Heats of Hydration02:42

Aqueous Solutions and Heats of Hydration

Water and other polar molecules are attracted to ions. The electrostatic attraction between an ion and a molecule with a dipole is called an ion-dipole attraction. These attractions play an important role in the dissolution of ionic compounds in water.
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The formation of a colloidal system is exemplified by an aqueous solution containing Cl− ions is introduced to another containing Ag+ ions, resulting in the precipitation of solid AgCl as extremely tiny crystals. Instead of settling out as a filterable precipitate, these crystals remain suspended in the liquid, showcasing a colloidal system.A colloidal system involves colloidal particles within the approximate range of 1 to 1000 nm in at least one dimension, dispersed in a medium called the...
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Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Châtelier’s principle. Consider the dissolution of silver iodide:

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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
11:04

Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature

Published on: December 20, 2016

Dissipation mechanisms in ionic liquids.

Erik J Stalcup1, Ralf Seemann, Stephan Herminghaus

  • 1Department of Physics, Cardwell Hall, Kansas State University, Manhattan, KS 66506-2601, USA.

Journal of Colloid and Interface Science
|August 15, 2009
PubMed
Summary
This summary is machine-generated.

Ionic liquids spread on smooth surfaces, a phenomenon previously understudied. A combined molecular kinetic and hydrodynamic model accurately describes the spreading behavior of [EMIM] ethyl sulfate and ECOENG 500.

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Area of Science:

  • Surface science
  • Physical chemistry
  • Materials science

Background:

  • Spreading of ionic liquids on molecularly smooth surfaces is an understudied area.
  • Understanding this phenomenon is crucial for applications involving ionic liquids on solid substrates.

Purpose of the Study:

  • To investigate and model the spreading behavior of ionic liquids on molecularly smooth solid surfaces.
  • To validate a combined molecular kinetic and hydrodynamic model for ionic liquid spreading.

Main Methods:

  • Experimental observation of spreading for [EMIM] ethyl sulfate and ECOENG 500.
  • Application and validation of the de Ruijter, de Coninck, and Oshanin model.
  • Analysis of parameters such as molecular friction coefficient, displacement, frequency, and microscopic cutoff.

Main Results:

  • The spreading of both [EMIM] ethyl sulfate and ECOENG 500 was successfully described by the chosen model.
  • Reasonable values for molecular kinetic and hydrodynamic parameters were obtained, supporting the model's applicability.
  • The model effectively captures the complex interplay of molecular and hydrodynamic factors in contact line motion.

Conclusions:

  • The combined molecular kinetic and hydrodynamic model provides an accurate description of ionic liquid spreading on smooth surfaces.
  • This study enhances the understanding of interfacial phenomena involving ionic liquids.
  • The findings offer a predictive framework for designing and utilizing ionic liquids in various surface-based applications.