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Titration
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===Preparation techniques=== Typical titrations require titrant and analyte to be in a liquid (solution) form. Though solids are usually dissolved into an aqueous solution, other solvents such as [[Acetic acid|glacial acetic acid]] or [[ethanol]] are used for special purposes (as in [[petrochemistry]], which specializes in petroleum.)<ref> {{Cite book | last = Matar | first = S. |author2=L.F. Hatch | title = Chemistry of Petrochemical Processes | publisher = Gulf Professional Publishing | edition = 2 | year = 2001 | isbn = 0-88415-315-0 }}</ref> Concentrated analytes are often diluted to improve accuracy. Many non-acidβbase titrations require a constant [[pH]] during the reaction. Therefore, a [[buffer solution]] may be added to the titration chamber to maintain the pH.<ref> {{Cite book | last = Verma | first = Dr. N.K. |author2=S.K. Khanna |author3=Dr B. Kapila | title = Comprehensive Chemistry XI | publisher = Laxmi Publications | location = New Delhi | pages = 642β645 | isbn = 81-7008-596-9 }}</ref> In instances where two reactants in a sample may react with the titrant and only one is the desired analyte, a separate [[Masking agent|masking solution]] may be added to the reaction chamber which eliminates the effect of the unwanted ion.<ref> {{Cite book | last = Patnaik | first = P. | title = Dean's Analytical Chemistry Handbook | publisher = McGraw-Hill Prof Med/Tech | edition = 2 | year = 2004 | pages = 2.11β2.16 | isbn = 0-07-141060-0 }}</ref> Some reduction-oxidation ([[redox]]) reactions may require heating the sample solution and titrating while the solution is still hot to increase the [[reaction rate]]. For instance, the oxidation of some oxalate solutions requires heating to {{convert|60|C|F}} to maintain a reasonable rate of reaction.<ref> {{Cite book | last = Walther | first = J.V. | title = Essentials of Geochemistry | publisher = Jones & Bartlett Learning | year = 2005 | pages = 515β520 | isbn = 0-7637-2642-7 }}</ref>
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