Mixture

For other uses, see Mixture (disambiguation).

In chemistry, a mixture is a material made up of two or more different chemical substances which can be separated by physical method. It's an impure substance made up of 2 or more elements or compounds mechanically mixed together in any proportion.[1] A mixture is the physical combination of two or more substances in which the identities are retained and are mixed in the form of solutions, suspensions or colloids.[2][3]

Mixtures are one product of mechanically blending or mixing chemical substances such as elements and compounds, without chemical bonding or other chemical change, so that each ingredient substance retains its own chemical properties and makeup.[4] 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 separated into their components by using physical (mechanical or thermal) means. Azeotropes 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).[5][6][7]

  1. ^ IUPAC, Compendium of Chemical Terminology, 2nd ed. (the "Gold Book") (1997). Online corrected version: (2006–) "mixture". doi:10.1351/goldbook.M03949
  2. ^ Whitten K.W., Gailey K. D. and Davis R. E. (1992). General chemistry (4th ed.). Philadelphia: Saunders College Publishing. ISBN 978-0-03-072373-5.[page needed]
  3. ^ Petrucci, Ralph H.; Harwood, William S.; Herring, F. Geography (2002). General chemistry: principles and modern applications (8th ed.). Upper Saddle River, N.J: Prentice Hall. ISBN 978-0-13-014329-7. LCCN 2001032331. OCLC 46872308.[page needed]
  4. ^ De Paula, Julio; Atkins, P. W. (2002). Atkins' Physical Chemistry (7th ed.). Oxford University Press. ISBN 978-0-19-879285-7.[page needed]
  5. ^ Alberts B.; et al. (2002). Molecular Biology of the Cell, 4th Ed. Garland Science. ISBN 978-0-8153-4072-0.[page needed]
  6. ^ Laidler K. J. (1978). Physical chemistry with biological applications. Menlo Park: Benjamin/Cummings. ISBN 978-0-8053-5680-9.[page needed]
  7. ^ Weast R. C., Ed. (1990). CRC Handbook of chemistry and physics. Boca Raton: Chemical Rubber Publishing Company. ISBN 978-0-8493-0470-5.[page needed]