分析化学B卷英文.doc

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1、题H—•二三四五六七八总分得分扬州大学试题纸（2006—2007学年第一学期）化学化工学院化学06年级课程AnalyticalChemistry（迓试）B卷I.Singlechoice(2pointsperquestion,30%)1.Whatisthestandarddeviationvalueforthedatasetlistedbelow:1.166&1.1559,1.1833,1.1622,1.1713,1.1699,1.1655;A.0.0085B.0.0079C.0.0274D.0.0188E.noneofthese

2、2.Whatisthegravimetricfactorforthedeterminationofthew/w%MgwhenprecipitatedasMg2?2O3?Atwts:Mg=24.305g,P=30.974gO=15.999gA.0.30658B.3.26178C.0.15329D.6.52355E.noneofthese3.Tfthetruevalueofameasurementdoesnotfallwithintheconfidencelimitsthistellsus:()A)nothingB)thatourm

3、easurementisnotpreciseC)thatourmeasurementisneitheraccuratenorpreciseD)thatourmeasurementisnotaccurateE)thatourtruevalueiswrong4.AliterofCuCLwatersolutionwhichcontains1.0mgofCuChhasaconcentrationofCuC^.A.1.0ppbB.1.0ppmC.1.0pptD.noneofthese5.£ofaabsorbingcomplexisalwa

4、ysdependentupontheA.thestabilityofthecomplexB.thethicknessofthecontainerC.thewavelengthoftheelectromagneticradiationD.theconcentrationofthecomples6.Thebestwaytoremoveimpuritiesresultingfromthemechanicalentrapmentandocclusionistotheprecipitate.()A.peptidizeB.reprecipi

5、tateC.digestD.washE.noneofthese7.TheequilibriumconstantforthereactionofMnO/andFe2+is(E°(MnO4'/Mn2+)=1.51V;E°(Fe3+/Fe2+)=0.77V)A.320B3.4xl012C5.2xlO62D4.8x10638.Youaretitratingaweakbase,CH3NH2,with0.05000MHC1.Ifyoustartwith25.00mLof0.1000Mbase,whatwillbethebestindicat

6、or(pickfromthoselistedbelow)todetecttheendpoint?Kb=4.35x10'4IndicatorpKaA.BromocresolGreen4.66B.BromocresolPurple6.12C.PhenolRed7.81D.Phenolphthalein9.4E.Noneofthese1.AseriesofsolutionscontainingNaOH,N^CCh,andNaHCOjaloneorincompatiblecombination,wastitratedwithHC1.Th

7、evolumeofHC1neededtotitratethesolutiontoaphenolphthaleinendpointisVimL.ContinuingtotitratethesolutiontoabromocresolgreenendpointneededV2mL.If2V]=V2,thecomponentofthemixtureisA、NaOH+Na2CO3B、Na2CO3+NaHCO3C、NaOH+NaHCOsD、NaOH+Na2CO3+NaHCO32.TheendpointindicatorusedintheF

8、ajan^sMethodisfluoroscein.Itisanindicator().A.acid-baseB.adsorptionC・complexometricD.noneofthese2+43.Theformationequilibriumconstan