分析化学B卷英文

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1、学院　　　　　　　　系　　　　　　班级　　　　　　　　学号　　　　　　　姓名　　　　　　　---------------------------------------装---------------------------------------订-------------------------------------------线-----------------------------------------------第1页扬州大学试题纸(2006　－2007学年第一学期)化学化工学院化学06年级课程AnalyticalChemistry

2、(考试)B卷题目一二三四五六七八总分得分I．Singlechoice(2pointsperquestion,30%)1.Whatisthestandarddeviationvalueforthedatasetlistedbelow:1.1668,1.1559,1.1833,1.1622,1.1713,1.1699,1.1655;A.0.0085B.0.0079C.0.0274D.0.0188E.noneofthese2.Whatisthegravimetricfactorforthedeterminationofthew/w%Mgwhenpreci

3、pitatedasMg2P2O3?Atwts:Mg=24.305g,P=30.974gO=15.999gA.0.30658B.3.26178C.0.15329D.6.52355E.noneofthese3.Ifthetruevalueofameasurementdoesnotfallwithintheconfidencelimitsthistellsus:()A)nothingB)thatourmeasurementisnotpreciseC)thatourmeasurementisneitheraccuratenorpreciseD)thatou

4、rmeasurementisnotaccurateE)thatourtruevalueiswrong4.AliterofCuCl2-watersolutionwhichcontains1.0mgofCuCl2hasaconcentrationofCuCl2.A.1.0ppbB.1.0ppmC.1.0pptD.noneofthese5.eofaabsorbingcomplexisalwaysdependentuponthe_____A.thestabilityofthecomplexB.thethicknessofthecontainerC.thew

5、avelengthoftheelectromagneticradiationD.theconcentrationofthecomples6.Thebestwaytoremoveimpuritiesresultingfromthemechanicalentrapmentandocclusionisto__________theprecipitate.()A.peptidizeB.reprecipitateC.digestD.washE.noneofthese第2页7.TheequilibriumconstantforthereactionofMnO4

6、-andFe2+is______(E0(MnO4-/Mn2+)=1.51V;E0(Fe3+/Fe2+)=0.77V)A.320B3.4´1012C5.2´1062D4.8´10638.Youaretitratingaweakbase,CH3NH2,with0.05000MHCl.Ifyoustartwith25.00mLof0.1000Mbase,whatwillbethebestindicator(pickfromthoselistedbelow)todetecttheendpoint?Kb=4.35´10-4IndicatorpKaA.Brom

7、ocresolGreen4.66B.BromocresolPurple6.12C.PhenolRed7.81D.Phenolphthalein9.4E.Noneofthese9.AseriesofsolutionscontainingNaOH,Na2CO3,andNaHCO3aloneorincompatiblecombination,wastitratedwithHCl.ThevolumeofHClneededtotitratethesolutiontoaphenolphthaleinendpointisV1mL.Continuingtotitr

8、atethesolutiontoabromocresolgreenendpointneededV2mL.If2V1=V2,