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Encyclopedia > Mixture

In chemistry, a mixture is a substance made by combining two or more different materials in such a way that no chemical reaction occurs. The objects do not bond together in a mixture. A mixture can usually be separated back into its original components. Some examples of Mixtures are oil, ocean water and soil. Mixtures are the product of a mechanical blending or mixing of chemical substances like elements and compounds, without chemical bonding or other chemical change, so that each ingredient substance retains its own chemical properties and makeup [1] . While there are no chemical changes in a mixture, physical properties of a mixture, such as its melting point, may differ from those of its components. Mixtures can usually be separated by any mechanical means. There are two different types of mixtures: homogeneous mixtures (including solutions and ) and heterogeneous mixtures (Suspensions)and colloidal dispersions For other uses, see Chemistry (disambiguation). ... Water and steam are two different forms of the same chemical substance A chemical substance is any material with a definite chemical composition, no matter where it comes from. ... The periodic table of the chemical elements A chemical element, or element, is a type of atom that is defined by its atomic number; that is, by the number of protons in its nucleus. ... A chemical compound is a chemical substance of two or more different chemically bonded chemical elements, with a fixed ratio determining the composition. ... The melting point of a crystalline solid is the temperature range at which it changes state from solid to liquid. ... In chemistry and chemical engineering, a separation process is a process that transforms a mixture of substances into two or more compositionally-distinct products. ... This article or section should be merged with solvent, soluble, and solubility equilibrium Dissolving table salt in water In chemistry, a solution is one or more substance (the solute) dissolved in another substance (the solvent) forming a homogenous mixture. ... Flour suspended in water In chemistry, a suspension is a dispersion (mixture) in which a finely-divided species is combined with another species, with the former being so finely divided and mixed that it doesnt rapidly settle out. ...


Homogeneous mixtures

Homogeneous mixtures are mixtures that have definite, true composition and properties. Particles are uniformly spread. For example, any amount of a given mixture has the same composition and properties. Examples are solutions and some alloys (but not all). A homogeneous mixture is a uniform mixture consisting of only one phase. Examples are gasoline and margarine. Making a saline water solution by dissolving table salt (NaCl) in water This article is about chemical solutions. ... An alloy is a homogeneous mixture of two or more elements, at least one of which is a metal, and where the resulting material has metallic properties. ...


A solution is a homogeneous mixture of two or more substances (the solutes) [[dissolve|dissolved in another substance (the solvent). Solutions have all particles within the size of atoms, small molecules or small ions, less than 1nm in all dimensions [2] . A common example would be a solid dissolving into a liquid (i.e. salt or sugar dissolving in water or gold into mercury). Liquids dissolve into one another, and sometimes liquids dissolve into gases, for example water vapor and the atmosphere. Common examples include soft drinks, where carbon dioxide is trapped in the liquid through carbonation. Several solution properties collectively called colligative properties change as a function of solute concentration. Solubility is a compound property types of solution: air. A substance is soluble in a fluid if it dissolves in the fluid. ... For other uses, see Solvent (disambiguation). ... For other uses, see Solid (disambiguation). ... A liquid will usually assume the shape of its container A liquid is one of the main states of matter. ... For other uses, see Salt (disambiguation). ... This article is about sugar as food and as an important and widely-traded commodity. ... GOLD refers to one of the following: GOLD (IEEE) is an IEEE program designed to garner more student members at the university level (Graduates of the Last Decade). ... General Name, Symbol, Number mercury, Hg, 80 Chemical series transition metals Group, Period, Block 12, 6, d Appearance silvery Standard atomic weight 200. ... It has been suggested that multiple sections of steam be merged into this article or section. ... For other uses, see Atmosphere (disambiguation). ... Carbon dioxide is a chemical compound composed of two oxygen atoms covalently bonded to a single carbon atom. ... For the chemical reaction forming calcium carbonate, see carbonatation. ... In chemistry, colligative properties are factors that determine how the properties of a bulk liquid solution change depending on the concentration of the solute in the bulk solution. ... Solubility is a chemical property referring to the ability for a given substance, the solute, to dissolve in a solvent. ...

Colloidal dispersions

Main article: Colloid

A homogeneous mixture in which the particles of one or more components have at least one dimension in the range of 1 to 1000nm, larger than those in a solution but smaller than those in a suspension [3] . 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 and a heterogeneous mixture with properties also intermediate between the two. A colloid will not settle if left to sit. Examples are jelly, glue ,milk etc. A Colloid or colloidal dispersion is a type of homogeneous mixture. ...


A heterogeneous mixture in which the particles of at least one component is larger than 1μm (1000nm) in at least one dimension, larger than colloidal particles [4] . Unlike colloids, suspensions will eventually settle. An example of a suspension would be sand in water. Particles of suspensions show tyndall effect, that is, they are big enough to disperse light. Image File history File links Mergefrom. ... It has been suggested that this article or section be merged into Mixture. ... It has been suggested that this article or section be merged into Mixture. ...

Heterogeneous mixtures

Heterogeneous mixtures are mixtures with indefinite composition, for example, granite. Salad is a typical example of this kind of mixture. Heterogeneous mixtures are said to have several phases (not to be confused with phases of matter). The parts of a heterogeneous composition can be mechanically separated from each other. Examples include: salad, trail mix, milk (before homogenization) and ponda. Close-up of granite from Yosemite National Park, valley of the Merced River Quarrying granite for the Mormon Temple, Utah Territory. ... Salad Platter Salad is a light meal — or, as part of a larger meal, much more of an appetizer — consisting of mixed vegetables (usually including at least one leaf vegetable) or fruit, often with a dressing or sauce, occasionally nuts and sometimes with the addition of meat, fish or cheese. ... In the physical sciences, a phase is a set of states of a macroscopic physical system that have relatively uniform chemical composition and physical properties (i. ...


IUPAC Gold Book Definition

  1. ^ Atkins' Physical Chemistry, 7th Ed. by Julio De Paula, P.W. Atkins ISBN 0198792859
  2. ^ Chemistry: Matter and Its Changes, 4th Ed. by Brady, Senese, ISBN 0471215171
  3. ^ Chemistry: Matter and Its Changes, 4th Ed. by Brady, Senese, ISBN 0471215171
  4. ^ Chemistry: Matter and Its Changes, 4th Ed. by Brady, Senese, ISBN 0471215171

  Results from FactBites:
ATSDR - Chemical Mixtures Program (548 words)
Simple mixtures of environmentally important chemicals such as arsenic, cadmium, chromium and mercury are being studied.
Dose-response relationships are being studied using mixtures of liver toxicants such as chloroform and trichloroethylene.
Mixtures of chemicals such as polychlorinated biphenyls (PCBs) and pentachlorophenol are being studied in the presence of chemicals that are found together and can influence skin absorption rates.
  More results at FactBites »



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