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Related Concept Videos

Entropy and Solvation02:05

Entropy and Solvation

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 ≥ 15); an...
Solubility03:00

Solubility

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, atoms, and/or ions)...
Solvents01:12

Solvents

A solvent is a substance, most often a liquid, that can dissolve other substances. Here, the substance being dissolved is called a solute. When a solvent and a solute combine, they form a solution - a homogenous mixture of both the solvent and the solute. Water is a universal biological solvent. Its polar structure allows it to dissolve many other polar compounds. The ability of water to dissolve is governed by a balance between water molecules binding to each other and binding to the solute.
A...
Intermolecular Forces in Solutions02:28

Intermolecular Forces in Solutions

The formation of a solution is an example of a spontaneous process, a process that occurs under specified conditions without energy from some external source.
When the strengths of the intermolecular forces of attraction between solute and solvent species in a solution are no different than those present in the separated components, the solution is formed with no accompanying energy change. Such a solution is called an ideal solution. A mixture of ideal gases (or gases such as helium and argon,...
Intermolecular Forces03:13

Intermolecular Forces

Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen bonds, and dispersion...
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.
When ionic compounds dissolve in water, the ions in the solid separate and disperse uniformly throughout the solution because water molecules surround and solvate the ions, reducing the strong electrostatic forces between them. This process...

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Updated: May 15, 2026

Probing the Structure and Dynamics of Interfacial Water with Scanning Tunneling Microscopy and Spectroscopy
10:28

Probing the Structure and Dynamics of Interfacial Water with Scanning Tunneling Microscopy and Spectroscopy

Published on: May 27, 2018

Water interfaces, solvation, and spectroscopy.

Phillip L Geissler1

  • 1Department of Chemistry, University of California, Berkeley, California 94720, USA. geissler@berkeley.edu

Annual Review of Physical Chemistry
|January 10, 2013
PubMed
Summary
This summary is machine-generated.

This review explores the statistical mechanics of liquid water, connecting molecular arrangements and dynamics to vibrational spectroscopy. It highlights how hydrogen-bond networks in bulk water are understood, while interfacial water properties are still being uncovered.

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Multimodal Nonlinear Hyperspectral Chemical Imaging Using Line-Scanning Vibrational Sum-Frequency Generation Microscopy
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Multimodal Nonlinear Hyperspectral Chemical Imaging Using Line-Scanning Vibrational Sum-Frequency Generation Microscopy

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Last Updated: May 15, 2026

Probing the Structure and Dynamics of Interfacial Water with Scanning Tunneling Microscopy and Spectroscopy
10:28

Probing the Structure and Dynamics of Interfacial Water with Scanning Tunneling Microscopy and Spectroscopy

Published on: May 27, 2018

Multimodal Nonlinear Hyperspectral Chemical Imaging Using Line-Scanning Vibrational Sum-Frequency Generation Microscopy
08:49

Multimodal Nonlinear Hyperspectral Chemical Imaging Using Line-Scanning Vibrational Sum-Frequency Generation Microscopy

Published on: December 1, 2023

Area of Science:

  • Physical Chemistry
  • Statistical Mechanics
  • Spectroscopy

Background:

  • Liquid water exhibits complex statistical mechanics from simple molecular components.
  • Understanding molecular arrangements and dynamics in water is crucial.

Purpose of the Study:

  • To review recent work on aqueous systems exploring molecular arrangements and their thermodynamic origins.
  • To connect vibrational spectroscopy signals to intermolecular structure statistics.
  • To discuss water at interfaces, particularly ion solvation.

Main Methods:

  • Review of recent research on aqueous systems.
  • Emphasis on vibrational spectroscopy of OH stretching.
  • Analysis of spectroscopic signals and intermolecular structure.

Main Results:

  • Established connections between vibrational spectroscopy and intermolecular structure.
  • Verified and enriched physical pictures of hydrogen-bond networks in bulk water.
  • Identified emerging understandings of water at interfaces.

Conclusions:

  • Vibrational spectroscopy is key to understanding water's molecular structure and dynamics.
  • Bulk water's properties are well-characterized, but interfacial water presents new challenges.
  • Solvation of ions at the air-water interface challenges current models of aqueous fluctuations.