ANALYTICAL CHEMISTRY EXAM #2
QUESTIONS AND CORRECT ANSWERS
VolumetricA2analysisA2-A2Ans--
theA2volumeA2ofA2aA2knownA2reagentA2requiredA2forA2completeA2reactionA2withA2analyteA2b
yA2aA2knownA2reactionA2isA2measured
TitrationA2-A2Ans--
aA2procedureA2inA2whichA2incrementsA2ofA2aA2knownA2reagentA2areA2addedA2toA2analyteA2
untilA2theA2reactionA2betweenA2analyteA2andA2titrantA2isA2complete
TitrantA2-A2Ans--theA2knownA2reagentA2usedA2inA2aA2titration
IndicatorA2-A2Ans--
aA2compoundA2withA2aA2physicalA2propertyA2(usuallyA2color)A2thatA2changesA2abruptlyA2wh
enA2theA2titrationA2isA2complete.
EquivalenceA2PointA2-A2Ans--
theA2pointA2whenA2theA2quantityA2ofA2titrantA2addedA2isA2theA2exactA2amountA2necessaryA2f
orA2stoichiometricA2reactionA2withA2theA2analyte;A2idealA2result
EndA2pointA2-A2Ans--
markedA2byA2aA2suddenA2changeA2inA2aA2physicalA2propertyA2ofA2theA2solution;A2whatA2we
A2actuallyA2measure
TitrationA2errorA2-A2Ans--
TheA2differenceA2betweenA2theA2endA2pointA2andA2theA2equivalenceA2point
BlankA2titrationA2-A2Ans--
theA2sameA2procedureA2ofA2titratingA2isA2carriedA2outA2withoutA2theA2analyteA2toA2estimateA
2theA2titrationA2error
PrimaryA2standardA2-A2Ans--
aA2reagentA2thatA2isA2pureA2enoughA2toA2weighA2outA2andA2useA2directlyA2toA2provideA2aA2k
nownA2numberA2ofA2moles;A2shouldA2beA299.9%A2pureA2orA2better
StandardizationA2-A2Ans--
TheA2processA2ofA2titratingA2aA2standardA2toA2determineA2theA2concentrationA2ofA2titrant
StandardA2solutionA2-A2Ans--aA2solutionA2whoseA2concentrationA2isA2known
DirectA2titrationA2-A2Ans--
titrantA2isA2addedA2toA2analyteA2untilA2theA2endA2pointA2isA2observed
, BackA2titrationA2-A2Ans--
knownA2excessA2orA2aA2standardA2reagentA2isA2addedA2toA2theA2analyte,A2thenA2aA2second
A2standardA2reagentA2isA2usedA2toA2titrateA2theA2excessA2ofA2theA2firstA2reagent
GravimetricA2titrationA2-A2Ans--titrantA2isA2measuredA2byA2mass,A2notA2volume
UniversalA2IndicatorA2-A2Ans--aA2solutionA2withA2aA2wideA2rangeA2ofA2colorA2changes
HydroidA2paperA2-A2Ans--
aA2paperA2thatA2goesA2throughA2changesA2similarA2toA2theA2universalA2indicatorA2solution
SolubilityA2productA2-A2Ans--
theA2equilibriumA2constantA2forA2theA2reactionA2inA2whichA2aA2solidA2saltA2(ionicA2compoun
d)A2dissolvesA2toA2giveA2itsA2constituentA2ionsA2inA2solution
SaturatedA2-A2Ans--
aA2solutionA2thatA2containsA2allA2theA2solidA2capableA2ofA2beingA2dissolved
CommonA2ionA2effectA2-A2Ans--
AA2saltA2isA2lessA2solubleA2ifA2oneA2ofA2itsA2constituentA2ionsA2isA2alreadyA2presentA2inA2the
A2solution
VolhardA2titrationA2-A2Ans--
formationA2ofA2aA2soluble,A2coloredA2complexA2atA2theA2endA2point
FajansA2titrationA2-A2Ans--
adsorptionA2ofA2aA2coloredA2indicatorA2onA2theA2precipitateA2atA2theA2endA2point
BronstedA2LowryA2acidA2-A2Ans--aA2protonA2donor
BronzedA2LowryA2baseA2-A2Ans--aA2protonA2acceptor
AutoprotolysisA2-A2Ans--selfA2ionization
StrongA2acidsA2-A2Ans--HCl
HBr
HI
H2SO4
HNO3
HClO4
StrongA2basesA2-A2Ans--LiOH
NaOH
KOH
RbOH
CsOH
QUESTIONS AND CORRECT ANSWERS
VolumetricA2analysisA2-A2Ans--
theA2volumeA2ofA2aA2knownA2reagentA2requiredA2forA2completeA2reactionA2withA2analyteA2b
yA2aA2knownA2reactionA2isA2measured
TitrationA2-A2Ans--
aA2procedureA2inA2whichA2incrementsA2ofA2aA2knownA2reagentA2areA2addedA2toA2analyteA2
untilA2theA2reactionA2betweenA2analyteA2andA2titrantA2isA2complete
TitrantA2-A2Ans--theA2knownA2reagentA2usedA2inA2aA2titration
IndicatorA2-A2Ans--
aA2compoundA2withA2aA2physicalA2propertyA2(usuallyA2color)A2thatA2changesA2abruptlyA2wh
enA2theA2titrationA2isA2complete.
EquivalenceA2PointA2-A2Ans--
theA2pointA2whenA2theA2quantityA2ofA2titrantA2addedA2isA2theA2exactA2amountA2necessaryA2f
orA2stoichiometricA2reactionA2withA2theA2analyte;A2idealA2result
EndA2pointA2-A2Ans--
markedA2byA2aA2suddenA2changeA2inA2aA2physicalA2propertyA2ofA2theA2solution;A2whatA2we
A2actuallyA2measure
TitrationA2errorA2-A2Ans--
TheA2differenceA2betweenA2theA2endA2pointA2andA2theA2equivalenceA2point
BlankA2titrationA2-A2Ans--
theA2sameA2procedureA2ofA2titratingA2isA2carriedA2outA2withoutA2theA2analyteA2toA2estimateA
2theA2titrationA2error
PrimaryA2standardA2-A2Ans--
aA2reagentA2thatA2isA2pureA2enoughA2toA2weighA2outA2andA2useA2directlyA2toA2provideA2aA2k
nownA2numberA2ofA2moles;A2shouldA2beA299.9%A2pureA2orA2better
StandardizationA2-A2Ans--
TheA2processA2ofA2titratingA2aA2standardA2toA2determineA2theA2concentrationA2ofA2titrant
StandardA2solutionA2-A2Ans--aA2solutionA2whoseA2concentrationA2isA2known
DirectA2titrationA2-A2Ans--
titrantA2isA2addedA2toA2analyteA2untilA2theA2endA2pointA2isA2observed
, BackA2titrationA2-A2Ans--
knownA2excessA2orA2aA2standardA2reagentA2isA2addedA2toA2theA2analyte,A2thenA2aA2second
A2standardA2reagentA2isA2usedA2toA2titrateA2theA2excessA2ofA2theA2firstA2reagent
GravimetricA2titrationA2-A2Ans--titrantA2isA2measuredA2byA2mass,A2notA2volume
UniversalA2IndicatorA2-A2Ans--aA2solutionA2withA2aA2wideA2rangeA2ofA2colorA2changes
HydroidA2paperA2-A2Ans--
aA2paperA2thatA2goesA2throughA2changesA2similarA2toA2theA2universalA2indicatorA2solution
SolubilityA2productA2-A2Ans--
theA2equilibriumA2constantA2forA2theA2reactionA2inA2whichA2aA2solidA2saltA2(ionicA2compoun
d)A2dissolvesA2toA2giveA2itsA2constituentA2ionsA2inA2solution
SaturatedA2-A2Ans--
aA2solutionA2thatA2containsA2allA2theA2solidA2capableA2ofA2beingA2dissolved
CommonA2ionA2effectA2-A2Ans--
AA2saltA2isA2lessA2solubleA2ifA2oneA2ofA2itsA2constituentA2ionsA2isA2alreadyA2presentA2inA2the
A2solution
VolhardA2titrationA2-A2Ans--
formationA2ofA2aA2soluble,A2coloredA2complexA2atA2theA2endA2point
FajansA2titrationA2-A2Ans--
adsorptionA2ofA2aA2coloredA2indicatorA2onA2theA2precipitateA2atA2theA2endA2point
BronstedA2LowryA2acidA2-A2Ans--aA2protonA2donor
BronzedA2LowryA2baseA2-A2Ans--aA2protonA2acceptor
AutoprotolysisA2-A2Ans--selfA2ionization
StrongA2acidsA2-A2Ans--HCl
HBr
HI
H2SO4
HNO3
HClO4
StrongA2basesA2-A2Ans--LiOH
NaOH
KOH
RbOH
CsOH