Aqueous solution


Aqueous solution
The first solvation shell of a sodium ion dissolved in water

An aqueous solution is a solution in which the solvent is water. It is usually shown in chemical equations by appending aq to the relevant formula, such as NaCl(aq). The word aqueous means pertaining to, related to, similar to, or dissolved in water. As water is an excellent solvent and is also naturally abundant, it is a ubiquitous solvent in chemistry.

Substances which are hydrophobic ('water fearing') often do not dissolve well in water whereas those that hydrophilic ('water-loving') do. An example of a hydrophilic substance would be sodium chloride (ordinary table salt). Acids and bases are aqueous solutions, as part of their Arrhenius definitions.

The ability of a substance to dissolve in water is determined by whether the substance can match or exceed the strong attractive forces that water molecules generate between themselves. If the substance lacks the ability to dissolve in water the molecules form a precipitate.

Aqueous solutions that conduct electric current efficiently contain strong electrolytes, while ones that conduct poorly are considered to have weak electrolytes. Those strong electrolytes are substances that are completely ionized in water, whereas the weak electrolytes exhibit only a small degree of ionization in water.

Nonelectrolytes are substances that dissolve in water, but which maintain their molecular integrity (do not dissociate into ions). Examples include sugar, urea, glycerol, and methylsulfonylmethane (MSM).

When performing calculations regarding the reacting of one or more aqueous solutions, one generally must know the concentration, or molarity, of the aqueous solutions. Solution concentration is given in terms of the form of the solute prior to it dissolving.

See also

References

  • Zumdahl S. 1997. Chemistry. 4th ed. Boston: Houghton Mifflin Company. p 133-145.



Wikimedia Foundation. 2010.

Look at other dictionaries:

  • aqueous solution — vandeninis tirpalas statusas T sritis fizika atitikmenys: angl. aqueous solution vok. Wasserlösung, f rus. водный раствор, m pranc. solution aqueuse, f …   Fizikos terminų žodynas

  • aqueous solution — solution in which water is the solvent, water based solution …   English contemporary dictionary

  • aqueous solution — noun a solution in water • Hypernyms: ↑solution …   Useful english dictionary

  • aqueous solution — a solution in which water is used as the solvent …   Medical dictionary

  • aqueous solution —    A solution with the solvent as water …   Forensic science glossary

  • aqueous solution — A water based solution …   Dictionary of automotive terms

  • Aqueous solution — Водный раствор …   Краткий толковый словарь по полиграфии

  • Metal ions in aqueous solution — A metal ion in aqueous solution is a cation, dissolved in water, of chemical formula [M(H2O)n]z+. The solvation number, n, determined by a variety of experimental methods is 4 for Li+ and Be2+ and 6 for elements in rows 3 and 4 of the periodic… …   Wikipedia

  • non-aqueous solution — nevandeninis tirpalas statusas T sritis chemija apibrėžtis Tirpalas, kurio tirpiklis ne vanduo. atitikmenys: angl. non aqueous solution; nonaqueous solution rus. неводный раствор …   Chemijos terminų aiškinamasis žodynas

  • Solution — This article is about chemical solutions. For other uses, see Solution (disambiguation). Making a saline water solution by dissolving table salt (NaCl) in water. The salt is the solute and the water the solvent. In chemistry, a solution is a… …   Wikipedia


Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.