- Suspension (chemistry)
chemistry, A suspension is a heterogenousfluid containing solidparticles that are sufficiently large for sedimentation. Usually they must be larger than 1 micrometre. [ Chemistry: Matter and Its Changes, 4th Ed. by Brady, Senese, ISBN 0471215171] The internal phase (solid) is dispersed throughout the external phase (fluid) through mechanical agitation, with the use of certain excipients or suspending agents. 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 colloidin which the suspended particles are smaller and do not settle. [The Columbia Electronic Encyclopedia, 6th ed.] In a solution, the dissolved substance does not exist as a solid and the two are homogeneously mixed.
A suspension of liquid droplets or fine solid particles in a gas is called an aerosol. In the atmosphere these consist of fine dust and
sootparticles, sea salt, biogenicand volcanogenic sulfates, nitrates, and clouddroplets.
Suspensions are classified on the basis of the
dispersed phaseand the dispersion medium, where the former is essentially solid while the latter may either be a solid, a liquid or a gas.
Mudor muddy water, is where soil, clay, or siltparticles are suspended in water.
Floursuspended in water, as pictured to the right.
*Chalk powder suspended in water.
*Dust particles suspended in air.
Wikimedia Foundation. 2010.
Look at other dictionaries:
Suspension — may refer to:In science: *The infrastructure of a suspension bridge *Suspension (topology), in mathematics *Suspension (chemistry), a mixture of two chemicals with the character that one does not rapidly settle outIn vehicles: *Suspension… … Wikipedia
suspension — /səˈspɛnʃən / (say suh spenshuhn) noun 1. the act of suspending. 2. the state of being suspended. 3. temporary abrogation, as of a law or privilege. 4. stoppage of payment of debts, etc., through financial inability, or insolvency. 5. Physical… … Australian English dictionary
suspension */*/ — UK [səˈspenʃ(ə)n] / US noun Word forms suspension : singular suspension plural suspensions 1) [countable/uncountable] the act of officially stopping something for a period of time the suspension of the peace talks a six month suspension of her… … English dictionary
suspension — sus penÂ·sion || sÉ™ spenÊƒn n. act of suspending; state of being suspended; postponement; temporary debarment; framework that supports a vehicle on its axles (Mechanics); particles suspended in a fluid (Chemistry) … English contemporary dictionary
List of chemistry topics — This page aims to list articles related to chemistry. This is so that those interested in the subject can monitor changes to the pages by clicking on Related Changes in the sidebar and on the bottom of the page.This list is not necessarily… … Wikipedia
industrial polymers, chemistry of — Introduction structure and composition of chemical compounds made up of long, chainlike molecules (molecule). What distinguishes polymers from other types of compounds is the extremely large size of the molecules. The size of a… … Universalium
Dispersion (chemistry) — This article is about dispersion in chemistry. For other forms of dispersion, see Dispersion (disambiguation). A dispersion is a system in which particles are dispersed in a continuous phase of a different composition (or state). See also… … Wikipedia
Glossary of chemistry terms — This page is a glossary of chemistry terms. Chemistry has an extensive vocabulary and a significant amount of jargon. This is a list of chemical terms, including laboratory tools, glassware, and equipment. Chemistry itself is a physical science… … Wikipedia
Fullerene chemistry — is a field of organic chemistry devoted to the chemical properties of fullerenes. Fullerenes and Related Structures (Topics in Current Chemistry) ISBN 3 540 64939 5 1993] [ Covalent fullerene chemistry François Diederich Pure Appl. Chem., Vol. 69 … Wikipedia
Saturation (chemistry) — In chemistry, saturation (from the Latin word saturare, meaning to fill) has six different meanings, all based on reaching a maximum capacity In physical chemistry, saturation is the point at which a solution of a substance can dissolve no… … Wikipedia