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相关概念视频

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

Distillation: Vapor–Liquid Equilibria

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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...
2.6K
Chemical and Solubility Equilibria02:21

Chemical and Solubility Equilibria

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The free energy change associated with dissolving a solute in a liter of solvent is called the free energy of a solution, ΔGsolution. The overall ΔGsolution is expressed as the balance of ΔGinteraction against the always-favorable free-energy of mixing, ΔGmixing. Solution formation is favorable if  ΔGsolution is less than zero, whereas it is unfavorable if ΔGsolution is greater than zero. In short, for a solution to form and complete dissolution to take place,...
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Solubility Equilibria03:07

Solubility Equilibria

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Solubility equilibria are established when the dissolution and precipitation of a solute species occur at equal rates. These equilibria underlie many natural and technological processes, ranging from tooth decay to water purification. An understanding of the factors affecting compound solubility is, therefore, essential to the effective management of these processes. This section applies previously introduced equilibrium concepts and tools to systems involving dissolution and precipitation.
The...
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Solubility Equilibria: Overview01:09

Solubility Equilibria: Overview

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When a substance such as sodium chloride is added to water, it dissolves, forming an aqueous solution. The extent of dissolution is called solubility. The process of dissolution can exist in equilibrium, just like other chemical processes. Solubility equilibria are also called precipitation equilibria because the process of solubility can be reversible. The reverse of the solubility process is called precipitation.
Solubility is important in biological and environmental processes. A notable...
573
Recrystallization: Solid–Solution Equilibria01:10

Recrystallization: Solid–Solution Equilibria

1.0K
Recrystallization is a purification technique used to separate impurities from solid compounds. In this technique, no chemical reactions occur. Instead, it exploits physical properties only, specifically, the solubility differences between the desired compound and impurities, either at a single temperature or at different temperatures, and under other selected conditions. The solid-solution equilibrium (solubility equilibrium) of each component in the solution represents a binary phase...
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Updated: May 23, 2025

Optimization of Processing of Tiebangchui with Highland Barley Wine Based on the Box-Behnken Design Combined with the Entropy Method
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用贝叶斯优化探索的第三级单离子离子液体

Longjie Liu1, Atsushi Kitada1, Atsuo Yamada1,2

  • 1Department of Chemical System Engineering, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-8656, Japan.

The journal of physical chemistry. B
|May 13, 2025
PubMed
概括
此摘要是机器生成的。

研究人员开发了一种新的三元单离子离子液体 (SCIL),其低点为43°C. 这一进步扩大了更安全的电解质的操作温度范围,克服了二进制系统的局限性.

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科学领域:

  • 电化学 电化学 电化学
  • 材料科学 材料科学 材料科学
  • 化学工程是化学工程的重要组成部分.

背景情况:

  • 单离子离子液体 (SCIL) 为电解质中的易燃有机溶剂提供了更安全的替代品.
  • 目前的研究仅限于二进制SCILs,因为在多元系统中确定eutectic组合的成本很高.

研究的目的:

  • 为了有效地识别SCILs的三元欧性成分.
  • 为了扩大SCIL电解质的工作温度范围.
  • 研究特定离子组合对SCIL特性的影响.

主要方法:

  • 利用贝叶斯优化来有效地识别三元欧特克组合.
  • 合成并描述了三元的SCIL:KFSI$_{0.31}$TFSI$_{0.25}$TFA$_{0.44}$.

主要成果:

  • 成功识别了一种三元的性成分,KFSI$_{0.31}$TFSI$_{0.25}$TFA$_{0.44}$,其点约为43°C.
  • 三元的SCIL表现出稳定性,在室温下保持超冷液态超过3个月.
  • 引入强大的易斯基TFA$^-$导致了离子-离子库伦比相互作用的增加,导致电导率低于二进制SCILs.

结论:

  • 贝叶斯优化能够有效地发现具有改善热性质的多元SCIL.
  • 开发的三元SCIL提供了扩展的操作温度范围,提高了安全性.
  • 平衡库伦比相互作用对于优化SCIL电解质中的导电性至关重要.