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In [[analytical chemistry]], a '''standard solution''' is a [[solution]] containing a precisely known [[concentration]] of an element or a substance |
In [[analytical chemistry]], a '''standard solution''' is a [[solution]] containing a precisely known [[concentration]] of an element or a substance. |
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A simple standard is obtained by the dilution of a single element or a substance in a soluble solvent with which it reacts. |
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==Uses== |
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A solution of acid can be standardized by titrating it against a solution of alkali of known concentration. Once this has been calculated, it can in turn be used as a standard solution to find the concentration of a solution of alkali. |
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Standard solutions are also commonly used to determine the concentration of an [[analyte|analyte species]]. By comparing the [[absorbance]] of the sample solution at a specific wavelength to a series of standard solutions at differing known concentrations of the analyte species, the concentration of the sample solution can be found via [[Beer's Law]]. Any form of [[spectroscopy]] can be used in this way so long as the analyte species has substantial absorbance in the spectra. The standard solution is a reference guide to discover the molarity of unknown species. |
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==References== |
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* {{cite book |
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|title=[[Compendium of Analytical Nomenclature|Compendium of Analytical Nomenclature: Definitive Rules 1987]] |
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|publisher=[[Wiley-Blackwell|Blackwell Scientific Publications]] |
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|location=Oxford |
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|year=1987 |
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|last1=Freiser |
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|first1=Henry |
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|last2=Nancollas |
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|first2=George H |
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|pages=48 |
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|isbn=0-63201-907-7}} |
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{{DEFAULTSORT:Standard solution}} |
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[[Category:Analytical chemistry]] |
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{{Chemistry-stub}} |
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[[cs:Titrační standard]] |
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[[es:Solución estándar]] |
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[[pl:Roztwór mianowany]] |
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[[ru:Титрант]] |
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[[th:สารละลายมาตรฐาน]] |
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Revision as of 09:35, 9 November 2011
In analytical chemistry, a standard solution is a solution containing a precisely known concentration of an element or a substance.