Information about Suspension (chemistry)
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Flour suspended in water (appears light blue because blue light is scattered off the flour particles to a greater extent than red light)
Suspension is a heterogenous fluid containing solid particles that are sufficiently large for sedimentation. Usually they must be larger than 1 micrometre [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.
- 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. They are classified on the basis of dosage form which may either be oral, topical or parental.
Common examples
- Mud or muddy water, is where soil, clay, or silt particles are suspended in water.
- Flour suspended in water, as pictured to the right.
- Paint
- Chalk powder suspended in water.
- Dust particles suspended in air.
See also
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.
2. ^ The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2007, Columbia University Press.
Heterogeneous is an adjective used to describe something derived from a different individual or species.
It is also an alternate spelling for Heterogeneous.
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It is also an alternate spelling for Heterogeneous.
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A solid object is in the states of matter characterized by resistance to deformation and changes of volume. At the microscopic scale, a solid has these properties :
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- The atoms or molecules that comprise the solid are packed closely together.
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Sedimentation describes the motion of molecules in solutions or particles in suspensions in response to an external force such as gravity, centrifugal force or electric force.
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A Colloid or colloidal dispersion is a type of heterogeneous mixture. A colloid consists of two separate phases: a dispersed and balls phase and a continuous phase. In a colloid, the dispersed phase is made of tiny particles or droplets that are distributed evenly throughout
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A Colloid or colloidal dispersion is a type of heterogeneous mixture. A colloid consists of two separate phases: a dispersed and balls phase and a continuous phase. In a colloid, the dispersed phase is made of tiny particles or droplets that are distributed evenly throughout
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Interface and Colloid Science deals with heterogeneous systems. "Fundamentals of Interface and Colloid Science by J.Kyklema [1] offer following definition of colloid:
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Interface and Colloid Science deals with heterogeneous systems. "Fundamentals of Interface and Colloid Science by J.Kyklema [1] offer following definition of colloid:
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Mud is a liquid or semi-liquid mixture of water and some combination of soil, silt, and clay. Ancient mud deposits harden over geological time to form siltstone or solid, mudrock lutites.
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SOiL is a five-piece Hard Rock band from Chicago, Illinois, United States. They formed in 1997 and are still active. They are signed to DRT Entertainment and have released four albums, their most recent being True Self which was released in March 27 2006.
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Clay is a naturally occurring material, composed primarily of fine-grained minerals, which show plasticity through a variable range of water content, and which can be hardened when dried or fired.
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Silt is soil or rock derived granular material of a specific grain size. Silt may occur as a soil or alternatively as suspended sediment in a water column of any surface water body. It may also exist as deposition soil at the bottom of a water body.
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An ingredient used in many foods, flour is a fine powder made by grinding cereals or other edible starchy plant seeds suitable for grinding. It is most commonly made from wheat—the word "flour" used without qualification implies wheatflour—but also maize (now called
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A Colloid or colloidal dispersion is a type of heterogeneous mixture. A colloid consists of two separate phases: a dispersed and balls phase and a continuous phase. In a colloid, the dispersed phase is made of tiny particles or droplets that are distributed evenly throughout
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Sols are lyophobic (solvent hating) suspensions of solid particles (1-1000 nanometres in size) in a liquid.
Sols may be prepared by dispersion or condensation. Dispersion techniques include grinding solids to colloidal dimensions in a ball mill (dry or wet) and Beidig's arc
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Sols may be prepared by dispersion or condensation. Dispersion techniques include grinding solids to colloidal dimensions in a ball mill (dry or wet) and Beidig's arc
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emulsion is a mixture of two immiscible (unblendable) substances. One substance (the dispersed phase) is dispersed in the other (the continuous phase). Examples of emulsions include butter and margarine, espresso, mayonnaise, the photo-sensitive side of photographic film, and
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Turbidity is a cloudiness or haziness of a fluid, or of air, caused by individual particles (suspended solids) that are generally invisible to the naked eye, similar to smoke in air.
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Settling is the process by which particulates settle to the bottom of a liquid and form a sediment.
Settling velocity or fall velocity or terminal velocity (ws) of a (sediment) particle is the at which the sediment settles in still fluid.
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Settling velocity or fall velocity or terminal velocity (ws) of a (sediment) particle is the at which the sediment settles in still fluid.
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This article is about chemical solutions. For other uses, see Solution (disambiguation).
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