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Qualitative and quantitative analysis

Quantitative Analysis is the determination of the absolute or relative abundance (often expressed as a concentration) of one, several or all particular substance(s) present in a sample. Quantitative chemical analysis, branch of chemistry that deals with the determination of the amount or percentage of one or more constituents of a sample. A variety of methods is employed for quantitative analyses, which for convenience may be broadly classified as chemical or physical, depending upon which properties are utilized. Chemical methods depend upon such reactions as precipitation, neutralization, oxidation, or, in general, the formation of a new compound.

Quantitative Analysis Examples

  • We used quantitative analysis to find that the ore contained 42.88% silver by mass.
  • The chemical reaction yielded 3.22 moles of product.
  • The solution is 0.102 M NaCl.

    • This method can be applied to only those compounds that changetheir state directly from solid to vapour on heating .

    Methods of Quantitative Analysis

    Several methods are used to quantify a sample. These may be broadly classified as either physical methods or chemical methods. Physical methods measure a physical property, such as adsorption of light, density, and magnetic susceptibility.