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Solutions
Last update: Saturday 11th of February 2012
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In chemistry, a solution is a homogeneous mixture composed of two or more substances, known as solutes, dissolved in another substance, known as a solvent. A common example is a solid, such as salt or sugar, dissolved in water, a liquid. Gases may dissolve in liquids, for example, carbon dioxide or oxygen in water. Liquids may dissolve in other liquids and gases always mix with other gases .
Examples of solid solutions are alloys, certain minerals and polymers containing plasticizers. The ability of one compound to dissolve in another compound is called solubility. The physical properties of compounds such as melting point and boiling point change when other compounds are added. Together they are called colligative properties. There are several ways to quantify the amount of one compound dissolved in the other compounds collectively called concentration. Examples are molality and parts per million (ppm).
Solutions should be distinguished from other non-homogeneous mixtures such as colloids and suspensions.
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