ANALYTICAL CHEMISTRY FINAL EXAM
QUESTIONS ACTUAL EXAM ALL
QUESTIONS AND WELL ELABORATED
ANSWERS TOP RATED VERSION FOR
ALREADY A+ GRADED HIGHLY
RECOMMENDED |NEW AND REVISED
TheCconcentrationCofCaCsoluteC(inCmol/LCorCmmol/mL)C-
CCORRECTCANSWEREquilibriumCmolarCconcentration
TheCspeciesCformedCwhenCaCbaseCacceptsCaCprotonC-CCORRECTCANSWERconjugateCacid
SolutionsCthatCtendCtoCresistCchangesCinCpHCasCtheCresultCofCdilutionCorCtheCadditionCofCsmallCamou
ntsCofCacidsCorCbasesC-CCORRECTCANSWERbufferCsolution
TheCprocessCofCsystematicallyCintroducingCanCamountCofCtitrantCthatCisCchemicallyCequivalentCtoCth
eCquantityCofCanalyteCinCaCsampleC-CCORRECTCANSWERtitration
WriteCmass-CandCcharge-balanceCexpressionsCforCaCsolutionCthatCisCsaturatedCinCAg2C2O4C-
CCORRECTCANSWERMB:
[Ag+]C=C2[C2O4^2-]C+C2[HC2O4^-]C+C2[H2CO4]
CB:
[Ag^+]C+C[H3O^+]C=C2[C2O4^2-]C+C[HC2O4^-]C+C[OH^-]
, IndicateCwhetherCanCaqueousCsolutionCofCKHC2O4CisCacidic,Cbasic,CorCneutral.CExplainCyourCanswer
.C-CCORRECTCANSWERHC2O4^-C+CH2OC=CC2O4^2-C+CH3O^+CKa2C=C5.42E-5
HC2O4^-C+CH2OC=CH2C2O4C+COH^-CKb2C=C1E-14C/C5.6E-2C=C1.79E-13
SolutionCwillCbeCacidicCsinceCKa2C>>CKb2
DistinguishCbetweenCgravimetricCtitrimetryCandCnon-titrimetricCgravimetricCmethodsCofCanalysisC-
CCORRECTCANSWERGravimetricCtitrimetryCusesCaCweightedCmassCofCaCtitrantCtoCdetermineCtheCco
ncentrationCofCanCanalyteCbasedConCtheCreactionCbetweenCtheCtitrantC&Canalyte.CNon-
titrimetricCgravimetricCmethodsCwillCnotCrelyConCtheCreactionCofCanCanalyteCandCtitrant,CtheyCwillCb
eCmeasuringCchangesCinCmass.
DemonstrateChowCtheCsulfideCionCconcentrationCisCrelatedCtoCtheChydroniumCionCconcentrationCof
CaCsolutionCthatCisCkeptCsaturatedCwithChydrogenCsulfide.C-
CCORRECTCANSWERTheCoverallCdissociationCconstantCforCH2SCis
[H3O^+]^2C[S^2-]C/C[H2S]C=CK1K2
InCaCsolutionCsaturatedCwithCtheCgas,C[H2S]CisCconstant,Ctherefore
[S^2-]C=C[H2S]C/C[H3O^+]C*CK1K2C
or
[S^2-]C=CKC/C[H3O^+]^2
QUESTIONS ACTUAL EXAM ALL
QUESTIONS AND WELL ELABORATED
ANSWERS TOP RATED VERSION FOR
ALREADY A+ GRADED HIGHLY
RECOMMENDED |NEW AND REVISED
TheCconcentrationCofCaCsoluteC(inCmol/LCorCmmol/mL)C-
CCORRECTCANSWEREquilibriumCmolarCconcentration
TheCspeciesCformedCwhenCaCbaseCacceptsCaCprotonC-CCORRECTCANSWERconjugateCacid
SolutionsCthatCtendCtoCresistCchangesCinCpHCasCtheCresultCofCdilutionCorCtheCadditionCofCsmallCamou
ntsCofCacidsCorCbasesC-CCORRECTCANSWERbufferCsolution
TheCprocessCofCsystematicallyCintroducingCanCamountCofCtitrantCthatCisCchemicallyCequivalentCtoCth
eCquantityCofCanalyteCinCaCsampleC-CCORRECTCANSWERtitration
WriteCmass-CandCcharge-balanceCexpressionsCforCaCsolutionCthatCisCsaturatedCinCAg2C2O4C-
CCORRECTCANSWERMB:
[Ag+]C=C2[C2O4^2-]C+C2[HC2O4^-]C+C2[H2CO4]
CB:
[Ag^+]C+C[H3O^+]C=C2[C2O4^2-]C+C[HC2O4^-]C+C[OH^-]
, IndicateCwhetherCanCaqueousCsolutionCofCKHC2O4CisCacidic,Cbasic,CorCneutral.CExplainCyourCanswer
.C-CCORRECTCANSWERHC2O4^-C+CH2OC=CC2O4^2-C+CH3O^+CKa2C=C5.42E-5
HC2O4^-C+CH2OC=CH2C2O4C+COH^-CKb2C=C1E-14C/C5.6E-2C=C1.79E-13
SolutionCwillCbeCacidicCsinceCKa2C>>CKb2
DistinguishCbetweenCgravimetricCtitrimetryCandCnon-titrimetricCgravimetricCmethodsCofCanalysisC-
CCORRECTCANSWERGravimetricCtitrimetryCusesCaCweightedCmassCofCaCtitrantCtoCdetermineCtheCco
ncentrationCofCanCanalyteCbasedConCtheCreactionCbetweenCtheCtitrantC&Canalyte.CNon-
titrimetricCgravimetricCmethodsCwillCnotCrelyConCtheCreactionCofCanCanalyteCandCtitrant,CtheyCwillCb
eCmeasuringCchangesCinCmass.
DemonstrateChowCtheCsulfideCionCconcentrationCisCrelatedCtoCtheChydroniumCionCconcentrationCof
CaCsolutionCthatCisCkeptCsaturatedCwithChydrogenCsulfide.C-
CCORRECTCANSWERTheCoverallCdissociationCconstantCforCH2SCis
[H3O^+]^2C[S^2-]C/C[H2S]C=CK1K2
InCaCsolutionCsaturatedCwithCtheCgas,C[H2S]CisCconstant,Ctherefore
[S^2-]C=C[H2S]C/C[H3O^+]C*CK1K2C
or
[S^2-]C=CKC/C[H3O^+]^2