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analytique-midterm-2014-1.pdf - 1l ftv, 2014 Durde: 80 min...

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1lftv,2014Durde:80minCHM2754Examen mi-sessionNOM#et.l.Un echantillondesdrum (ayantvolume25.0prl),adtd analys6pourlateneurenglucose.Ils'estr6vdl6contenir26.Jpe.Calculerlaconcentrationdeglucoseenppm.{V=ar.o//r=2stt6-(L={.5x /r>-tL2'5l6urt7Jyl=2.fr,"-5Ltrlooa5t-t-d.srfo-"gLql^rr*70"--fY{6*2xto6-[email protected]x/op_-rJ2,2. LeproduitdesolubilitedeBa(OH)zest de3x10-ad25oC.B.Qt+).-d-+aona)QuelestlepHd'unesolutiond'eau contenantBa(OH)zd25"C?Vous pouvez n6gliger lescoefficientsd'activitdet aussilacontributionvenantdeI'ionisationde I'eauelle-mme.M[orlo^SFto*'ll1o,t,lsul:2YM1-'-b9,torlo=3lro'f4'il[:t:;'oo=g,tnrt{,z nd4=l-ts(>qo-t38'q3x/o^-
A'l,q4x/0"11pr6cipiterleBa(OH)rapartird'unesolutionde0.80Mencompldtement solubledansI'eau.=31/o-{b) CalculerlepHndcessairepourBaClz?NoterqueleBaClzest/tts-ltou7'Tffu'I-o,r'$4@nc)Calculerla force ioniqued'unesolutionde0.80MenBaClz.'&U,-tr+rCI*o,r l(oHJ*=.jl2Lolt-J-=-'-6ff-Js3r/o-Y3t'd@Ic-Hs\-TtYlo-'(4?-{,1lY'/o-13[H*l6-"1=o.trHLcl-J="2XO,K:1,6f1t("sY2^+laxl)=3A-{yDo*d"f/t1d)Utiliserlaversion laplussimpledelaloideDebye-Hiickelpourcalculerlescoefficientsd'activit{de Ba2* et deOH'dansunesolution

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Term
Winter
Professor
HeschelTeitelbaum
Tags
Glucose, solution aqueuse, Acide, Acide lactique, Potentiel hydrog ne, Ba OH z

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