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Aqueous solution

Solution in which the solvent is water / From Wikipedia, the free encyclopedia

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An aqueous solution is a solution in which the solvent is water. It is mostly shown in chemical equations by appending (aq) to the relevant chemical formula. For example, a solution of table salt, or sodium chloride (NaCl), in water would be represented as Na+(aq) + Cl(aq). The word aqueous (which comes from aqua) means pertaining to, related to, similar to, or dissolved in, water.[1] As water is an excellent solvent and is also naturally abundant, it is a ubiquitous solvent in chemistry. Since water is frequently used as the solvent in experiments, the word solution refers to an aqueous solution, unless the solvent is specified.[2]

Na%2BH2O.svg
The first solvation shell of a sodium ion dissolved in water

A non-aqueous solution is a solution in which the solvent is a liquid, but is not water.[3] (See also Solvent and Inorganic nonaqueous solvent.)