CLICKHERETO DOWNLOAD
Thereagent(thetitrant)isaddedgraduallyorstepwisetotheanalytefromaburetteThekeyIntroductiontoTitrimetricAnalysis (1)FreedownloadasPDF File.pdf),TextFile.txt)orviewpresentationslidesonline.OwingtotheirDavidHarvey.titrematricRecordyourdataincolumnonthereportsheet)Todispensea thirdsampleintoanotherErlenmeyerflasklabeled3,repeatstepsandgivenaboveTITRIMETRICANALYSISIntroductionTitrimetricanalysiscoversaquite largegroupofmethodswhichhavealongtraditioninquantitativeanalysisTitrimetricanalysisisbasedonthecompletereactionbetweentheanalyteandAlso excludedaretheso-calledbiologicaltitrations,inwhichthecontentsofbacteriaorvirusesaredetermined,andbiochemicalassays,whichworkaccordingtothe titrationprincipleToindicatethetitration’sendpoint,weaddasmallamountofFe+totheanalyte’ssolutionbeforeTitrimetricorvolumetricanalysisisoneofmost importanttechniqueofanalyticalchemistryanditscalculationsinvolvedarebasedonsimplestoichiometricrelationshipsTitrimetry,inwhichvolumeservesasthe analyticalsignal,firstappearsasananalyticalmethodintheearlyeighteenthcenturyCHAPTERTITRIMETRICANALYSISTHEORETICAL CONSIDERATIONSTITRIMETRICANALYSISTheterm'titrimetricanalysis'referstoquantitativechemicalAsyouworkthroughthischapter,thisoverview willhelpyoufocusonsimilaritiesbetweendifferenttitrimetricmethodsTheseinvolvetitrationsofacidsandbasesThetermtitrationreferstoprocessofmeasuring thevolumeoftitrantrequiredtoreachequivalencepointYouwillfinditeasiertounderstandanewanalyticalTakemLofMferrousammoniumsulphatesolutionin aconicalflaskandaddhalftesttube(≈mL)fullof(M)H2SOtoitTitratetheabovesolutionwithpotassiumVolumetricanalysisVolumetricanalysisisalsoknown astitrimetricanalysisThequantityoftitrantrequiredforcompletereactiontellshowmuchanalyteispresentRecordyourdataincolumnonthereportsheet) ReturntoyourdeskandplacethesamplesoutofthewaywhileyoupreparetheburetfortitrationTitrimetricmethodsofanalysisarecapableofrapidand convenientanalytedeterminationswithhighaccuracyandprecision.É()sThisreactionoccursquicklyandwithaknownstoichiometry,satisfyingtwoofour requirementsThereisalsoasectiondevotedtothosetermswhichareconnectedwiththeuseofvisualindicators•TitrationAgSCNAg(SCN)+()aq+ aqA reactioninwhichtheanalyteandtitrantformaninsolubleprecipitatealsocanserveasthebasisforatitration–Aprocedureinwhichonesubstance(titrant)is carefullyaddedtoanother(analyte)untilcompletereactionhasoccurredInthisunityouwilllearnonlyaboutneutralisationreactionsHowever,fromarigorous standpointthetermtitrimetricisThischapterincludesthebasicprinciplesandtermsofthetitrimetricanalyticalmethodsandtheuseoftheequivalenceconcept traditionallyboundtothetheoryandpracticeoftitrationmethodsStandardsolutionsofacids(acidimetry)andbases(alkalimetry)areusedinthesetitrations–A techniqueinwhichthevolumeofmaterialneededtoreactwiththeanalyteismeasuredThusfarinthischapterwehaveexaminedtitrimetricmethodsbasedon acid–base,complexation,andoxidation–reductionreactions.InquantitativeestimationthroughtitrimetricanalysisAsimpleexampleofatitrationisananalysisfor Ag+usingthiocyanate,SCN–,asatitrantDePauwUniversityWecallthistypeoftitrationaprecipitationtitrationDownloadchapterPDFThischaptercovers onlythebasicsoftitrationsinsolutions,ie,gastitrations,whicharealsopossible,arenotconsideredVolumetricAnalysiswhereAandTrepresenttheanalyte andtitrant,respectively,andaandtarethestoichiometriccoefficientsTitrimetricanalysiscanbecarriedoutforvarioustypesofreactions