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Related Concept Videos

Solubility of Ionic Compounds02:55

Solubility of Ionic Compounds

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Solubility is the measure of the maximum amount of solute that can be dissolved in a given quantity of solvent at a given temperature and pressure. Solubility is usually measured in molarity (M) or moles per liter (mol/L). A compound is termed soluble if it dissolves in water.
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Distillation: Vapor–Liquid Equilibria01:01

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Distillation is a separation technique that takes advantage of the boiling point properties of disparate elements in a mixture. To perform distillation, we begin by heating a miscible mixture of two liquids with a significant difference in boiling points (at least 20°C). As the solution heats up and reaches the bubble point of the more volatile component, some molecules of the more volatile component transition into the gas phase and travel upward into the condenser, which is a glass tube...
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Molecular and Ionic Solids02:54

Molecular and Ionic Solids

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Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
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High-Performance Liquid Chromatography: Elution Process01:05

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In High-Performance Liquid Chromatography (HPLC), the elution process is critical to the separation of analytes and the quality of chromatographic results. Elution describes how compounds move through the column and separate based on their interactions with the mobile and stationary phases. This process determines the resolution, peak shape, and retention times in the chromatogram, which are essential for identifying and quantifying components in complex mixtures. Understanding the elution...
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Vapor Pressure of Fluid01:28

Vapor Pressure of Fluid

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The vapor pressure of a fluid is a crucial concept in fluid mechanics, influencing phenomena such as boiling and cavitation. Vapor pressure refers to the pressure exerted by a vapor at a state of thermodynamic equilibrium with its corresponding liquid phase at a specific temperature. It represents the tendency of molecules to escape from the fluid surface into the vapor phase.
When a liquid is placed in a closed container with a small air space, and the space is evacuated, vapor molecules will...
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Ionic Strength: Effects on Chemical Equilibria01:19

Ionic Strength: Effects on Chemical Equilibria

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The addition of an inert ionic compound increases the solubility of a sparingly soluble salt. For example, adding potassium nitrate to a saturated solution of calcium sulfate significantly enhances the solubility of calcium sulfate. Le Châtelier's principle cannot predict this shift in the equilibrium. Instead, this could be explained in terms of changes in the effective concentration of the ions in solution in the presence of added inert salt.
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Related Experiment Video

Updated: Aug 8, 2025

Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
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Recent Progress in Vacuum Engineering of Ionic Liquids.

Yuji Matsumoto1

  • 1Department of Applied Chemistry, School of Engineering, Tohoku University, 6-6-07 Aramaki-Aza-Aoba, Aoba-ku, Sendai 980-8579, Japan.

Molecules (Basel, Switzerland)
|February 25, 2023
PubMed
Summary
This summary is machine-generated.

Ionic liquids (ILs) are versatile vacuum-compatible materials. This review details their vacuum engineering, from film deposition and characterization to novel applications in crystal growth and electronics.

Keywords:
crystal growthionic liquidthin filmvacuum deposition

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Area of Science:

  • Materials Science
  • Vacuum Technology
  • Physical Chemistry

Background:

  • Ionic liquids (ILs) are unique liquids stable in vacuum at room temperature.
  • For two decades, ILs have been explored for vacuum analysis and processes.
  • This review summarizes the advancements in vacuum engineering of ILs.

Purpose of the Study:

  • To provide a state-of-the-art overview of vacuum engineering techniques applied to ionic liquids.
  • To highlight novel applications and characterization methods for ILs in vacuum environments.
  • To discuss the potential of ILs in advanced material processing and device fabrication.

Main Methods:

  • Nanoscale vacuum deposition of IL films.
  • Ellipsometry for in situ monitoring of IL film thickness and glass transitions.
  • Surface thermal fluctuation spectroscopy for rheological property investigation.
  • IL-VLS (vapor-liquid-solid) growth for enhanced vacuum deposition.

Main Results:

  • Thickness-dependent ionic conductivity of IL films was analyzed.
  • IL-VLS growth improved crystallinity, morphology, and polymorph control of vacuum-deposited materials.
  • Metal ion-containing ILs serve as low-temperature evaporation sources.
  • Thin film nano IL gels function as gate electrolytes in organic transistors.

Conclusions:

  • Ionic liquids offer significant potential in various vacuum-based applications.
  • Advanced characterization techniques enable precise control over IL properties in vacuum.
  • ILs are emerging as key materials for next-generation electronics and material synthesis.