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Videos de Conceptos Relacionados

Precipitation of Ions03:11

Precipitation of Ions

Predicting Precipitation
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
Ions and Ionic Charges03:27

Ions and Ionic Charges

In ordinary chemical reactions, the nucleus — which contains the protons and neutrons of each atom and thus identifies the element — remains unchanged. Electrons, however, can be added to atoms by transfer from other atoms, lost by transfer to other atoms, or shared with other atoms. The transfer and sharing of electrons among atoms govern the chemistry of the elements. During the formation of some compounds, atoms gain or lose electrons to form electrically charged particles called ions.
Ionic Strength: Overview01:12

Ionic Strength: Overview

The ionic strength of a solution is a quantitative way of expressing the total electrolyte concentration of a solution. This concept was first introduced in 1921 by two American physical chemists, Gilbert N. Lewis and Merle Randall, while describing the activity coefficient of strong electrolytes. During the calculation of ionic strength (I or μ), all the cations and anions are considered. However, the concentration (c) of an ion with a greater charge number (z) has a greater contribution to...
Ions, Molecules, and Compounds01:23

Ions, Molecules, and Compounds

Ions - When an atom participates in a chemical reaction that results in the donation or acceptance of one or more electrons, the atom becomes positively or negatively charged. This frequently happens for most atoms to have a full valence shell. This can happen either by gaining electrons to fill a shell that is more than half-full or by giving away electrons to empty a shell that is less than half-full, thereby leaving the next smaller electron shell as the new, full valence shell. An atom with...
Ion Exchange01:17

Ion Exchange

Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or basic...
Common Ion Effect03:24

Common Ion Effect

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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Video Experimental Relacionado

Updated: Jul 11, 2026

Real-time Iontophoresis with Tetramethylammonium to Quantify Volume Fraction and Tortuosity of Brain Extracellular Space
10:45

Real-time Iontophoresis with Tetramethylammonium to Quantify Volume Fraction and Tortuosity of Brain Extracellular Space

Published on: July 24, 2017

Io es la Nube de Sodio de Io.

B A Goldberg, G W Garneau, S K Lavoie

    Science (New York, N.Y.)
    |November 2, 1984
    PubMed
    Resumen
    Este resumen es generado por máquina.

    Las observaciones terrestres revelan nuevos detalles sobre Júpiter.

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    Área de la Ciencia:

    • Ciencias planetarias Ciencias planetarias.
    • La astronomía es la astronomía.
    • Física del espacio Física del espacio

    Sus antecedentes:

    • La nube de sodio neutral de Io es una característica clave de la magnetosfera de Júpiter.
    • Las observaciones anteriores carecían de una resolución espacial y temporal detallada de la región de origen de la nube.

    Objetivo del estudio:

    • Para obtener las primeras imágenes bidimensionales de la región de la fuente de la nube de sodio neutral de Io.
    • Para estudiar exhaustivamente las variaciones espaciales y temporales de la nube.

    Principales métodos:

    • Observación desde tierra utilizando técnicas avanzadas de imagen.
    • Se obtuvieron secuencias de imágenes calibradas de alta resolución en tiempo real.

    Principales resultados:

    • Se obtuvieron las primeras imágenes en 2D de la región de la fuente de la nube de sodio.
    • Las asimetrías observadas sugieren una eyección no isotrópica de sodio de Io.
    • La nube exhibe un comportamiento dependiente de la órbita, morfologías espaciales y cambios temporales.
    • Se indicó la estabilidad geométrica de la fuente de sodio.

    Conclusiones:

    • La nueva evidencia apoya la eyección no isotrópica de sodio de Io.
    • La nube de sodio de Io muestra un comportamiento complejo y dinámico vinculado a su órbita.
    • Los cambios temporales de la nube ahora son aislables, allanando el camino para su uso como sonda.