现代仪器分析第二版课后答案（modern instrument analysis second edition after class answer）

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1、现代仪器分析第二版课后答案（Moderninstrumentanalysissecondeditionafterclassanswer）F8dModerninstrumentanalysisexercisesanswerSpring2009ThetwelfthchapterispotentialanalysisandionselectiveelectrodeanalysisP2161.whatispotentiometricanalysis?Whatisionselectiveelectrodeanalysis?Answer:theele

2、ctrochemicalanalysisoftheactivityorconcentrationofthesubstancetobemeasurediscalledpotentiometrybyusingtherelationshipbetweentheelectrodepotentialandtheactivityorconcentrationofacertainioninthesolution.Potentiometricanalysisusinganionselectiveelectrodeasanindicatorelectrod

3、eiscalledionselectiveelectrodeanalysis.2.whatistheindicatingelectrodeandreferenceelectrodeinpotentiometricanalysis?Whatisthedifferencebetweenmetalbasedelectrodeandmembraneelectrode?Answer:inelectrochemistry,thepotentialchangeswiththeactivityorconcentrationoftheiontobemeas

4、uredinthesolution,andtheelectrodethatcanreflecttheactivityorconcentrationoftheiontobemeasurediscalledtheindicatingelectrode.Theelectrodewithconstantelectrodepotential,whichisnotaffectedbythecompositionofthesolutionorthedirectionofthecurrentflow,iscalledareferenceelectrode

5、.Thesensitivefilmofmetalbaseelectrodeismadebymeltingtherigidmatrixglassofionexchangetype.Thesensitivefilmofmembraneelectrodeisasinglecrystal,polycrystallineormixedcrystalactivefilm,whichisformedbypressingordrawingthemetalinsolublesaltwhichisverysmallinwaterandcanbeconduct

6、ive.4.whatisTISABsolution?Whatroledoesitplay?Atotalofionicstrengthadjustmentbuffer(TISAB)wasaddedintothesolutionbyaddingalargenumberofinertelectrolytes,appropriatepHbuffersandcertainmaskingagentstothedeterminationofionswithoutinterference.Itseffectsareasfollows:constantio

7、nicstrength,controlsolutionpH,eliminationofinterferingioneffectandstableliquidjunctionpotential.5.25degrees,themeasuredbatterywithpH=4.00standardbuffersolution:H+glasselectrode(a=Xmol?L-1)electricpotentialsaturatedcalomelelectrode"for0.814V,thentheC(HAc)=1.00*10-3mol?L-1a

8、ceticacidsolution,howmuchistheelectromotiveforceofthebatteries?(KHAc=1.8x10-5,setaH+=[H+])Soluti