实验#5电位滴定

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1、EXPERIMENT#5:PotentiometricTitration实验#5:电位滴定WARNINGNOTICE:Theexperimentsdescribedinthesematerialsarepotentiallyhazardousandrequireahighlevelofsafetytraining,specialfacilitiesandequipment,andsupervisionbyappropriateindividuals.Youbearthesoleresponsibility,liability,andriskfortheimplementationofs

2、uchsafetyproceduresandmeasures.MITshallhavenoresponsibility,liability,orriskforthecontentorimplementationofanyofthematerialpresented.LegalNoticesTitration-1EXPERIMENT#5:PotentiometricTitration警告：在这些资料中所描述的实验是有潜在危险的，而且要求有高度的安全训练、特别的设施和装备，且要有适当的人员监督下才能进行的。你要独自承担责任，义务，而且要为履行上述的安全手续和措施负责。麻省理工学院将没有责任

3、，义务，或是为满足上述材料提及到的安全措施而负责。法律说明MASSACHUSETTSINSTITUTEOFTECHNOLOGYDepartmentofChemistry5.310LaboratoryChemistry麻省理工学院化学系5.310化学实验EXPERIMENT#5实验#5THEPOTENTIOMETRICTITRATIONOFANACIDMIXTUREAdaptedformicroscalequantitiesbyM.D.Gheorghiu.Theexperimentincludescontributionsfrompastinstructors,coursetextboo

4、ks,andothersaffiliatedwithcourse#5.310.一个酸混合物1的电位滴定I.PURPOSEOFTHEEXPERIMENTI.实验目的Inthisexperimentthequantitativecompositionofasolution,whichisamixtureofamonoproticstrongacidandaweakertriprotic,acidwillbedeterminedbypotentiometricmethods.Thisexperimentwillintroduceyoutoquantitativevolumetricanaly

5、sisandpotentiometrictitrations.在这个实验中，会用到电位法来确定一个由一元强酸和一个较弱的三元酸定量混合的溶液的组成。这个实验将会向你介绍定量容量分析法和电位滴定法(A)Acarbonate-freesodiumhydroxidesolutionispreparedandstandardizedagainstpurepotassiumhydrogenphthalate(KHP),andisthenusedinapotentiometrictitrationoftheacidmixture(A)先要准备一个不含碳酸盐的氢气化钠溶液，然后用纯的邻苯二甲酸氢钾(

6、KHP)来标定它。在以后的酸混合物的电位滴定中会被用到。(B)Threeorfour1.0mLaliquotsofyouracidwillbeusedforpotentiometrictitrations.Eachtitrationmustbecontinuedthroughtwoequivalencepoints(B)在电位滴位中会用到三或四吸管的酸液。每一次滴定都必须要连续通过两个等当点。1.摘自M.D.Gheorghiu的微量。这个实验包括了过去讲师的贡献、教科书，以及其它参与过本课程的人的回馈。Titration-13EXPERIMENT#5:PotentiometricTit

7、rationII.INTRODUCTIONII.引言Strongacids,likehydrochloricacid,arecompletelydissociatedinwater,butweakacids,likeaceticacid,areonlypartiallydissociated.Theextentofdissociationcanbecalculatedfromthevalueoftheequilibriumconstantand