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- Cerimetry abstract "Cerimetry or cerimetric titration, also known as cerate oximetry, is a method of volumetric chemical analysis, a redox titration in which a Fe2+-1,10-phenanthroline complex (ferroin) color change indicates the end point. Ferroin can be reversibly discolored in its oxidized form upon titration with a Ce4+ solution. The use of cerium(IV) salts as reagents for volumetric analysis was first proposed in the middle of 19th century, but systematic studies did not start until about 70 years later. Standard solutions can be prepared from different Ce4+ salts, but often cerium sulfate is chosen.Since cerimetry is linked to the Fe3+/Fe2+ redox pair, it can be used for analyses of nonstoichiometric levels that either oxidize Fe2+ or reduce Fe3+. For the case of oxidation, a precise excess of high-purity crystalline Mohr’s salt is added upon the oxide digestion in aqueous hydrogen chloride (HCl), while for the case of reduction, an excess of 1 M iron trichloride (FeCl3) is added. In the both cases, this is Fe2+ ions which will be titrated subsequently. Because the Ce4+ solution is prone to hydrolysis, the titration is done in a strongly HCl-acidic solution into which some phosphoric acid (H3PO4) is added to obtain a less colored phosphato complex of Fe3+.According to tabulated values of standard potentials at pH = 0 for the first-row transition metals, any nonstoichiometry below the following oxidation states will reduce 1 M FeCl3 solution whereas any nonstoichiometry above them will oxidize the Mohr’s salt: Ti4+, V4+, Cr3+, Mn2+, Co2+, and Ni2+. In addition, any nonstoichiometry in the Fe(III)–Fe(II) range is titrated directly with no additives, any nonstoichiometry below Fe2+ will reduce 1 M FeCl3 whereas any nonstoichiometry above Fe3+ will oxidize Mohr’s salt. In the second- and third-row transition metals, only the early elements would be suitable for the titration, and the limiting oxidation states are Zr4+, Nb5+, Mo4+, Hf4+, Ta5+, and W6+. Standard potentials involving rhenium ions are too close to E° for Fe3+/Fe2+ as well as to each other. Nonstoichiometry of oxides containing several elements in oxidation states suitable for cerimetry is determined in one titration.".
- Cerimetry wikiPageID "31690148".
- Cerimetry wikiPageLength "4336".
- Cerimetry wikiPageOutDegree "49".
- Cerimetry wikiPageRevisionID "550958509".
- Cerimetry wikiPageWikiLink Ammonium_iron(II)_sulfate.
- Cerimetry wikiPageWikiLink Analytical_chemistry.
- Cerimetry wikiPageWikiLink Category:Analytical_chemistry.
- Cerimetry wikiPageWikiLink Category:Cerium.
- Cerimetry wikiPageWikiLink Category:Titration.
- Cerimetry wikiPageWikiLink Cerium.
- Cerimetry wikiPageWikiLink Cerium(IV)_sulfate.
- Cerimetry wikiPageWikiLink Chlorine.
- Cerimetry wikiPageWikiLink Chromium.
- Cerimetry wikiPageWikiLink Cobalt.
- Cerimetry wikiPageWikiLink Ferroin.
- Cerimetry wikiPageWikiLink Hafnium.
- Cerimetry wikiPageWikiLink Hydrogen.
- Cerimetry wikiPageWikiLink Hydrogen_chloride.
- Cerimetry wikiPageWikiLink Hydrolysis.
- Cerimetry wikiPageWikiLink Iodometry.
- Cerimetry wikiPageWikiLink Iron.
- Cerimetry wikiPageWikiLink Iron(III)_chloride.
- Cerimetry wikiPageWikiLink Manganese.
- Cerimetry wikiPageWikiLink Molybdenum.
- Cerimetry wikiPageWikiLink Nickel.
- Cerimetry wikiPageWikiLink Niobium.
- Cerimetry wikiPageWikiLink Non-stoichiometric_compound.
- Cerimetry wikiPageWikiLink Oxidation_state.
- Cerimetry wikiPageWikiLink Oxidizing_agent.
- Cerimetry wikiPageWikiLink Oxygen.
- Cerimetry wikiPageWikiLink Phenanthroline.
- Cerimetry wikiPageWikiLink Phosphoric_acid.
- Cerimetry wikiPageWikiLink Phosphorus.
- Cerimetry wikiPageWikiLink Redox.
- Cerimetry wikiPageWikiLink Redox_indicator.
- Cerimetry wikiPageWikiLink Redox_titration.
- Cerimetry wikiPageWikiLink Reducing_agent.
- Cerimetry wikiPageWikiLink Rhenium.
- Cerimetry wikiPageWikiLink Tantalum.
- Cerimetry wikiPageWikiLink Titanium.
- Cerimetry wikiPageWikiLink Titration.
- Cerimetry wikiPageWikiLink Transition_metal.
- Cerimetry wikiPageWikiLink Tungsten.
- Cerimetry wikiPageWikiLink Vanadium.
- Cerimetry wikiPageWikiLink Volume.
- Cerimetry wikiPageWikiLink Zirconium.
- Cerimetry wikiPageWikiLinkText "Cerimetry".
- Cerimetry wikiPageWikiLinkText "cerimetry".
- Cerimetry subject Category:Analytical_chemistry.
- Cerimetry subject Category:Cerium.
- Cerimetry subject Category:Titration.
- Cerimetry hypernym Method.
- Cerimetry type Software.
- Cerimetry type Element.
- Cerimetry type Lanthanide.
- Cerimetry comment "Cerimetry or cerimetric titration, also known as cerate oximetry, is a method of volumetric chemical analysis, a redox titration in which a Fe2+-1,10-phenanthroline complex (ferroin) color change indicates the end point. Ferroin can be reversibly discolored in its oxidized form upon titration with a Ce4+ solution. The use of cerium(IV) salts as reagents for volumetric analysis was first proposed in the middle of 19th century, but systematic studies did not start until about 70 years later.".
- Cerimetry label "Cerimetry".
- Cerimetry sameAs Q6054.
- Cerimetry sameAs Cerimetrie.
- Cerimetry sameAs Cerimetria.
- Cerimetry sameAs Cerometria.
- Cerimetry sameAs m.0gtxjkm.
- Cerimetry sameAs Цериметрия.
- Cerimetry sameAs Serimetri.
- Cerimetry sameAs Цериметрія.
- Cerimetry sameAs Q6054.
- Cerimetry wasDerivedFrom Cerimetry?oldid=550958509.
- Cerimetry isPrimaryTopicOf Cerimetry.