Editing Mixture (section)

{{Short description|Substance formed when two or more constituents are physically combined}}
{{Other uses|Mixture (disambiguation)}}
{{Use dmy dates|date=July 2021}}
In [[chemistry]], a '''mixture''' is a [[material]] made up of two or more different chemical substances which can be separated by physical method. It is an impure substance made up of 2 or more elements or compounds mechanically mixed together in any proportion.<ref>{{GoldBookRef|title=mixture |file=M03949 }}</ref> A mixture is the physical combination of two or more substances in which the identities are retained and are mixed in the form of [[Solution (chemistry)|solution]]s, [[Suspension (chemistry)|suspensions]] or [[colloid]]s.<ref>{{cite book|author=Whitten K.W., Gailey K. D. and Davis R. E.|year= 1992|title=  General chemistry |edition=4th |publisher= Saunders College Publishing|location= Philadelphia|isbn= 978-0-03-072373-5}}{{page needed|date=October 2021}}</ref><ref>{{cite book |last1 = Petrucci |first1 = Ralph H. |last2 = Harwood |first2 = William S. |last3 = Herring |first3 = F. Geography |date=2002 |title = General chemistry: principles and modern applications |url = https://archive.org/details/generalchemistry00hill |url-access = registration |edition=8th |location=Upper Saddle River, N.J |publisher=Prentice Hall |isbn = 978-0-13-014329-7 |lccn=2001032331 |oclc=46872308 }}{{page needed|date=October 2021}}</ref>

Mixtures are one product of mechanically blending or mixing chemical substances such as [[chemical element|elements]] and [[Compound (chemistry)|compounds]], without chemical bonding or other chemical change, so that each ingredient substance retains its own chemical properties and makeup.<ref>{{Cite book|title=Atkins' Physical Chemistry|last1=De Paula|first1=Julio|last2=Atkins|first2=P. W.|year=2002|publisher=Oxford University Press |isbn=978-0-19-879285-7|edition=7th}}{{page needed|date=October 2021}}</ref> Despite the fact that there are no chemical changes to its constituents, the physical properties of a mixture, such as its [[melting point]], may differ from those of the components. Some mixtures can be [[separation process|separated]] into their components by using physical (mechanical or thermal) means. [[Azeotrope]]s are one kind of mixture that usually poses considerable difficulties regarding the separation processes required to obtain their constituents (physical or chemical processes or, even a blend of them).<ref name="Alberts">{{cite book|author=Alberts B.|display-authors=etal|year=2002|title= Molecular Biology of the Cell, 4th Ed.|publisher= Garland Science|isbn=978-0-8153-4072-0}}{{page needed|date=October 2021}}</ref><ref name="Laider">{{cite book|author=Laidler K. J.|year=1978|title=Physical chemistry with biological applications |publisher=Benjamin/Cummings|location= Menlo Park|isbn=978-0-8053-5680-9}}{{page needed|date=October 2021}}</ref><ref name="Weast">{{cite book|author=Weast R. C., Ed.|year= 1990|title=CRC Handbook of chemistry and physics|publisher= Chemical Rubber Publishing Company|location= Boca Raton|isbn=978-0-8493-0470-5}}{{page needed|date=October 2021}}</ref>