Changes

==Etymology==

==Etymology==

com- + [[Latin]] centrum [[center]]

com- + [[Latin]] centrum [[center]]

*Date: [http://www.wikipedia.org/wiki/17th_Century 1641]

*Date: [https://www.wikipedia.org/wiki/17th_Century 1641]

==Definitions==

==Definitions==

:transitive verb  

:transitive verb  

In [[chemistry]], '''concentration''' is the [[measure]] of how much of a given substance there is mixed with another substance. This can apply to any sort of chemical mixture, but most frequently the [[concept]] is limited to [[homogeneous]] solutions, where it refers to the amount of solute in the solvent.

In [[chemistry]], '''concentration''' is the [[measure]] of how much of a given substance there is mixed with another substance. This can apply to any sort of chemical mixture, but most frequently the [[concept]] is limited to [[homogeneous]] solutions, where it refers to the amount of solute in the solvent.

To concentrate a solution, one must add more [http://en.wikipedia.org/wiki/Solute solute] (e.g. alcohol), or reduce the amount of [http://en.wikipedia.org/wiki/Solvent solvent] (e.g. water). By [[contrast]], to dilute a solution, one must add more solvent, or reduce the amount of solute.

To concentrate a solution, one must add more [https://en.wikipedia.org/wiki/Solute solute] (e.g. alcohol), or reduce the amount of [https://en.wikipedia.org/wiki/Solvent solvent] (e.g. water). By [[contrast]], to dilute a solution, one must add more solvent, or reduce the amount of solute.

Unless two substances are fully [http://en.wikipedia.org/wiki/Miscible miscible] there exists a concentration at which no further solute will dissolve in a solution. At this point, the solution is said to be [http://en.wikipedia.org/wiki/Saturation_(chemistry) saturated]. If additional solute is added to a saturated solution, it will not dissolve (except in certain circumstances, when [http://en.wikipedia.org/wiki/Supersaturation supersaturation] may occur). Instead, [http://en.wikipedia.org/wiki/Phase_(matter)#Phase_separation phase separation] will occur, leading to either coexisting phases or a [http://en.wikipedia.org/wiki/Suspension_(chemistry) suspension]. The point of saturation depends on many variables such as ambient temperature and the precise chemical [[nature]] of the solvent and solute.

Unless two substances are fully [https://en.wikipedia.org/wiki/Miscible miscible] there exists a concentration at which no further solute will dissolve in a solution. At this point, the solution is said to be [https://en.wikipedia.org/wiki/Saturation_(chemistry) saturated]. If additional solute is added to a saturated solution, it will not dissolve (except in certain circumstances, when [https://en.wikipedia.org/wiki/Supersaturation supersaturation] may occur). Instead, [https://en.wikipedia.org/wiki/Phase_(matter)#Phase_separation phase separation] will occur, leading to either coexisting phases or a [https://en.wikipedia.org/wiki/Suspension_(chemistry) suspension]. The point of saturation depends on many variables such as ambient temperature and the precise chemical [[nature]] of the solvent and solute.

[[Category: Chemistry]]

[[Category: Chemistry]]

[[Category: General Reference]]

[[Category: General Reference]]