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Encyclopedia > Suspension (chemistry)
Flour suspended in water (appears light blue because blue light is scattered off the flour particles to a greater extent than red light)
Flour suspended in water (appears light blue because blue light is scattered off the flour particles to a greater extent than red light)

In chemistry, a suspension is a heterogenous mixture in which the particles of at least one component are larger than 1μm (1000nm) in at least one dimension, larger than colloidal particles.[1] Unlike colloids, suspensions will eventually settle. An example of a suspension would be sand in water. The suspended particles are visible under a microscope and will settle over time if left undisturbed. This distinguishes a suspension from a colloid in which the suspended particles are smaller and do not settle.[2] In a solution, the dissolved substance does not exist as a solid and the two are homogeneously mixed. Wikipedia does not have an article with this exact name. ... Wikipedia does not have an article with this exact name. ... Chemistry - the study of atoms, made of nuclei (conglomeration of center particles) and electrons (outer particles), and the structures they form. ... In general, a colloid or colloidal dispersion is a substance with components of one or two phases, a type of mixture intermediate between a homogeneous mixture (also called a solution) and a heterogeneous mixture with properties also intermediate between the two. ...


Definition: A suspension is a heterogenous mixture in which the internal phase is dispersed throughout the external phase through mechanical agitation, with the use of certain excipients or suspending agents. Classification: They are classified on the basis of the dispersed phase and the dispersion medium, where the former is essentially solid while the latter may either be a solid, a liquid or a gas.

 Also they are classified on the basis of dosage form which may either be oral, topical or parental 

See also

In general, a colloid or colloidal dispersion is a substance with components of one or two phases, a type of mixture intermediate between a homogeneous mixture (also called a solution) and a heterogeneous mixture with properties also intermediate between the two. ... Sols are lyophobic (solvent hating) suspensions of solid particles (1-1000 nanometres in size) in a liquid. ... A. Two immisicible liquids, not emulsified; B. An emulsion of Phase B dispersed in Phase A; C. The unstable emulsion progressively separates; D. The surfactant (purple outline) positions itself on the interfaces between Phase A and Phase B, stabilizing the emulsion An emulsion is a mixture of two immiscible (unblendable... Turbidity standards of 5, 50, and 500 NTU Turbidity is a cloudiness or haziness of water (or other fluid) caused by individual particles (suspended solids) that are generally invisible to the naked eye, thus being much like smoke in air. ... Settling is the process by which particulates settle to the bottom of a liquid and form a sediment. ... This article or section cites very few or no references or sources. ... Making a saline water solution by dissolving table salt (NaCl) in water This article is about chemical solutions. ...

References

  1. ^ Chemistry: Matter and Its Changes, 4th Ed. by Brady, Senese, ISBN 0471215171
  2. ^ The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2007, Columbia University Press.

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