ANALYTICAL CHEMISTRY FINAL- ACS EXAM 2022
1.ppm:
g gANS>> g(grams ganalyte/grams gsample)x10^6
2.Molarity:
g gANS>> g gmoles ganalyte/liter gof gsolution
3.Volume gPercent: g
ggANS>> g(volume gsolute/volume gsoution)x100
4.Volume gppm:
g g gANS>> g g(volume gsolute/volume gsolution)x10^6
5.kilo-:
gANS>> g g10^3
6.deci-:
gANS>> g g10^-1
7.centi-:
g gANS>> g g10^-2
8.milli-: g
ANS>> g10^-3
9.micro-: g
gANS>> g10^-6
10.nano-: g
gANS>> g10^-9
11.pico-: g
ANS>> g10^-12
12.femto-:
g gANS>> g g10^-15
13.weight gpercent:
gANS>> g g(grams ganalyte/grams gsample)x100
1 g/
g27
,ANALYTICAL CHEMISTRY FINAL- ACS EXAM 2022
14.ppt:
gANS>> g g(grams ganalyte/grams gsample)x10^3
15.ppt gsimplified:
g gANS>> g ggram ganalyte/liter gsolution
16.ppm gsimplified:
g gANS>> g gmg ganalyte/liter gsolution
17.ppb gsimplified: g
gANS>> gmicrograms ganalyte/liter gsolution
18.pptr gsimplified:
g gANS>> g gnanograms ganalyte/liter gsolution
19.buoyancy gcorrection:
g g gANS>> g gm=(m'(1-(air gdensity/weight gdensity)))/(1-(air gdensity/ob-
gject gdensity))
20.accuracy:
g gANS>> g gcloseness gof gthe gmean gto gthe g"true gvalue"
21.precision:
g g gANS>> g greproducibility gof gindividual gmeasurements
22.Uncertainty gin gAddition/Subraction:
g gANS>> g ge=sqrt(ex1^2+ex2^2+ex3^2+...)
23.Uncertainty gin
Multiplication/Division: g
g g g g g g g g gANS>> ge=y*sqrt((ex1/x1)^2+(ex2/x2)^2+(ex3/x3)^2+...)
24.Significant gFigures gin gLogarithms gand gantilogarithms:
g g g g gANS>> g gthe gnumber gof gsignif- gicant gfigures gin gthe glog gshould
gequal gthe gnumber gof gdigits gin gthe gmantissa
25.How gmany gsignificant gfigures gin glog(205.5):
2 g/
g27
,ANALYTICAL CHEMISTRY FINAL- ACS EXAM 2022
ANS>> g gfour gsignificant gfigures, gso gyou gwill gneed gfour gdecimal
gggggg
gplaces gin gyour ganswer
26.pH:
g gANS>> g g-log[H3O+]
27.[H3O+]: g
gANS>> g10^-Ph
28.Absorbance:
g gANS>> g g-log(transmittance)
29.Random gError:
g g g gANS>> g g-repeated gmeasurements gare gsometimes ghigh gand
gsometimes glow
-cannot gbe gcorrected gfor
30.Systematic gError:
g g g g g gANS>> g g-repeated gmeasurements gare gusually galways ghigh gor
galways glow
-can gand gshould gbe gcorrected gfor
31.Relative guncertainty=:
g gANS>> g gabsolute guncertainty/magnitude gof gmeasurement
3 g/
g27
1.ppm:
g gANS>> g(grams ganalyte/grams gsample)x10^6
2.Molarity:
g gANS>> g gmoles ganalyte/liter gof gsolution
3.Volume gPercent: g
ggANS>> g(volume gsolute/volume gsoution)x100
4.Volume gppm:
g g gANS>> g g(volume gsolute/volume gsolution)x10^6
5.kilo-:
gANS>> g g10^3
6.deci-:
gANS>> g g10^-1
7.centi-:
g gANS>> g g10^-2
8.milli-: g
ANS>> g10^-3
9.micro-: g
gANS>> g10^-6
10.nano-: g
gANS>> g10^-9
11.pico-: g
ANS>> g10^-12
12.femto-:
g gANS>> g g10^-15
13.weight gpercent:
gANS>> g g(grams ganalyte/grams gsample)x100
1 g/
g27
,ANALYTICAL CHEMISTRY FINAL- ACS EXAM 2022
14.ppt:
gANS>> g g(grams ganalyte/grams gsample)x10^3
15.ppt gsimplified:
g gANS>> g ggram ganalyte/liter gsolution
16.ppm gsimplified:
g gANS>> g gmg ganalyte/liter gsolution
17.ppb gsimplified: g
gANS>> gmicrograms ganalyte/liter gsolution
18.pptr gsimplified:
g gANS>> g gnanograms ganalyte/liter gsolution
19.buoyancy gcorrection:
g g gANS>> g gm=(m'(1-(air gdensity/weight gdensity)))/(1-(air gdensity/ob-
gject gdensity))
20.accuracy:
g gANS>> g gcloseness gof gthe gmean gto gthe g"true gvalue"
21.precision:
g g gANS>> g greproducibility gof gindividual gmeasurements
22.Uncertainty gin gAddition/Subraction:
g gANS>> g ge=sqrt(ex1^2+ex2^2+ex3^2+...)
23.Uncertainty gin
Multiplication/Division: g
g g g g g g g g gANS>> ge=y*sqrt((ex1/x1)^2+(ex2/x2)^2+(ex3/x3)^2+...)
24.Significant gFigures gin gLogarithms gand gantilogarithms:
g g g g gANS>> g gthe gnumber gof gsignif- gicant gfigures gin gthe glog gshould
gequal gthe gnumber gof gdigits gin gthe gmantissa
25.How gmany gsignificant gfigures gin glog(205.5):
2 g/
g27
,ANALYTICAL CHEMISTRY FINAL- ACS EXAM 2022
ANS>> g gfour gsignificant gfigures, gso gyou gwill gneed gfour gdecimal
gggggg
gplaces gin gyour ganswer
26.pH:
g gANS>> g g-log[H3O+]
27.[H3O+]: g
gANS>> g10^-Ph
28.Absorbance:
g gANS>> g g-log(transmittance)
29.Random gError:
g g g gANS>> g g-repeated gmeasurements gare gsometimes ghigh gand
gsometimes glow
-cannot gbe gcorrected gfor
30.Systematic gError:
g g g g g gANS>> g g-repeated gmeasurements gare gusually galways ghigh gor
galways glow
-can gand gshould gbe gcorrected gfor
31.Relative guncertainty=:
g gANS>> g gabsolute guncertainty/magnitude gof gmeasurement
3 g/
g27
