Editing Solubility (section)

==Qualifiers used to describe extent of solubility==
The extent of solubility ranges widely, from infinitely soluble (without limit, i.e. [[miscible]]<ref name=clug2000>{{cite book |last1=Clugston |first1=M. |last2=Fleming |first2=R. |year=2000 |page=108 |title=Advanced Chemistry |edition=1st |publisher=Oxford Publishing |location=Oxford}}</ref>) such as [[ethanol]] in water, to essentially insoluble, such as [[titanium dioxide]] in water. A number of other descriptive terms are also used to qualify the extent of solubility for a given application. For example, [[U.S. Pharmacopoeia]] gives the following terms, according to the mass ''m''<sub>sv</sub> of solvent required to dissolve one unit of mass ''m''<sub>su</sub> of solute:<ref>"Pharmacopeia of the United States of America, 32nd revision, and the National Formulary, 27th edition", 2009, pp.1 to 12.</ref> (The solubilities of the examples are approximate, for water at 20–25&nbsp;°C.)

{| class="wikitable" 
|-
! Term 
! Range (''m''<sub>sv</sub>/''m''<sub>su</sub>)
! Example
! g/dL
! ''m''<sub>sv</sub>/''m''<sub>su</sub>
|- 
| Very soluble 
| <1
| [[calcium nitrate]]
| 158.7
| 0.63
|- 
| Freely soluble
| 1 to 10
| [[calcium chloride]]
| 65
| 1.54
|- 
| Soluble
| 10 to 30
| [[sodium oxalate]]
| 3.9
| 26
|- 
| Sparingly soluble 
| 30 to 100
|
|
|
|- 
| Slightly soluble
| 100 to 1000
| [[calcium sulfate]]
| 0.21
| 490
|- 
| Very slightly soluble
| 1000 to 10,000
| [[dicalcium phosphate]]
| 0.02
| 5000
|- 
| Practically insoluble or insoluble 
| ≥ 10,000
| [[barium sulfate]]
| 0.000245
| 409000
|}

The thresholds to describe something as insoluble, or similar terms, may depend on the application. For example, one source states that substances are described as "insoluble" when their solubility is less than 0.1 g per 100 mL of solvent.<ref>{{cite web |url=https://www.chem.wisc.edu/deptfiles/genchem/sstutorial/Text11/Tx112/tx112.html |title=Fundamentals of Chemistry: Solubility |last1=Rogers |first1=Elizabeth |last2=Stovall |first2=Iris |date=2000 |website=Department of Chemistry |publisher=University of Wisconsin |access-date=22 April 2015 |archive-date=13 April 2015 |archive-url=https://web.archive.org/web/20150413034332/http://www.chem.wisc.edu/deptfiles/genchem/sstutorial/Text11/Tx112/tx112.html |url-status=dead}}</ref>