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1. A type of quantitative analysis in which the amount of a species in a material is determined by converting the species to a product that can be isolated completely and weighed is “gravimetric analysis.”

   What is gravimetric analysis?

   Gravimetric analysis is a quantitative chemical analysis method in which the contribution sought is transformed into a material (of different compositions) that can be separated and weighed from the sample.

   Some key features regarding the gravimetric analysis are-

   • Gravimetric analysis typically involves the following steps:

   1. preparation of a solution containing the known weight of sample,
   2. separation of a required constituent,
   3. weighing the isolated constituent, and
   4. computation of exact amount of a particular constituent with in sample from a estimated weight of a isolated substance.

   • The most common method for isolating the preferred constituent from a sample solution is precipitation—that is, transition into a substance that is not soluble in the solution.
   • A reagent is added, which constitutes an insoluble compound only with desired constituent but does not precipitate the sample’s other constituents.
   • Filtration is used to separate the precipitate, which is then washed to remove soluble impurities, dried and ignited to drain water, and weighed.
   • Certain substances, such as carbonate in a mineral analysis, can be separated due to their easy conversion into gaseous compounds.

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