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Related Concept Videos

Solubility03:00

Solubility

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Solution, Solubility, and Solubility Equilibrium
A solution is a homogeneous mixture composed of a solvent, the major component, and a solute, the minor component. The physical state of a solution—solid, liquid, or gas—is typically the same as that of the solvent. Solute concentrations are often described with qualitative terms such as dilute (of relatively low concentration) and concentrated (of relatively high concentration).
In a solution, the solute particles (molecules,...
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Physical Properties Affecting Solubility02:19

Physical Properties Affecting Solubility

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Solutions of Gases in Liquids
As for any solution, the solubility of a gas in a liquid is affected by the attractive intermolecular forces between solute and solvent species. Unlike solid and liquid solutes, however, there is no solute-solute intermolecular attraction to overcome when a gaseous solute dissolves in a liquid solvent since the atoms or molecules comprising a gas are far separated and experience negligible interactions. Consequently, solute-solvent interactions are the sole...
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Factors Affecting Solubility04:01

Factors Affecting Solubility

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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 Chȃtelier’s principle. Consider the dissolution of silver iodide:
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Entropy and Solvation02:05

Entropy and Solvation

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The process of surrounding a solute with solvent is called solvation. It involves evenly distributing the solute within the solvent. The rule of thumb for determining a solvent for a given compound is that like dissolves like. A good solvent has molecular characteristics similar to those of the compound to be dissolved. For example, polar solutions dissolve polar solutes, and apolar solvents dissolve apolar solutes. A polar solvent is a solvent that has a high dielectric constant (ϵ...
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Theories of Dissolution: The Danckwerts' Model and Interfacial Barrier Model01:09

Theories of Dissolution: The Danckwerts' Model and Interfacial Barrier Model

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Various dissolution theories provide insight into the factors that influence the dissolution rate. Danckwerts' Model suggests that turbulence, rather than a stagnant layer, characterizes the dissolution medium at the solid-liquid interface. In this model, the agitated solvent contains macroscopic packets that move to the interface via eddy currents, facilitating the absorption and delivery of the drug to the bulk solution. The regular replenishment of solvent packets maintains the...
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Solubility Equilibria03:07

Solubility Equilibria

60.4K
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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Using MD Simulations To Calculate How Solvents Modulate Solubility.

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Summary
This summary is machine-generated.

Predicting solute solubility is crucial for both theoretical understanding and practical applications. Molecular dynamics simulations with a general small-molecule force field accurately predict relative solubility, outperforming other methods.

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Area of Science:

  • Physical Chemistry
  • Computational Chemistry

Background:

  • Solubility is critical for theoretical insights into molecular interactions and practical applications in process chemistry and separations.
  • Understanding how solvent environments modulate solute solubility is key to controlling chemical processes.

Purpose of the Study:

  • To predict the solubility of solutes, focusing on how solvent environments affect solubility.
  • To calculate relative solubilities by changing the solvent for a given compound.

Main Methods:

  • Molecular Dynamics (MD) simulations were employed to calculate relative solubilities.
  • Calculated values were compared against experimental data and results from other methods like SMD and UNIFAC.

Main Results:

  • Molecular simulations using a general small-molecule force field demonstrated superior accuracy in predicting solubility.
  • This simulation approach outperformed both SMD and UNIFAC in accuracy and chemical space coverage.

Conclusions:

  • Straightforward molecular simulation methods provide a highly accurate approach for predicting relative solubilities.
  • The developed method offers a more robust alternative to existing techniques like SMD and UNIFAC for solubility predictions.