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State of Texas Assessments of
Academic Readiness
STAAR®
Chemistry
Administered May 2013
TX-EOC-CHEM__Release-Form-May-2013__r3__052813.indd 1 6/26/13 8:39 AM
RELEASED
Copyright © 2013, Texas Education Agency. All rights reserved. Reproduction of all or portions of this work is prohibited without express written permission from the Texas Education Agency.
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State of Texas Assessments of
Academic Readiness
STAARTM
TX-EOC-CHEM__Release-Form-May-2013__r3__052813.indd 2 5/28/2013 12:34:28 PM
( )
STAAR CHEMISTRY REFERENCE MATERIALS State of Texas
Assessments of Academic Readiness
STAARTM
ATOMIC STRUCTURE
Speed of light = (frequency)(wavelength) c f λ=
Energy = (Planck’s constant)(frequency) Ephoton hf=
Energy = (Planck’s constant)(speed of light)
(wavelength)Ephoton
hc=λ
BEHAVIOR OF GASES
Total pressure of a gas = sum of the partial pressures
of the component gases P P P PT
. . .= + + +1 2 3
(Pressure)(volume) = (moles)(ideal gas constant)(temperature) PV nRT=
(Initial pressure)(initial volume)
(Initial moless)(initial temperature)
(final pressure)(final=
volume)
(final moles)(final temperature)
PV
n T
PV
n T1 1
1 1
2 2
2 2
=
(Initial pressure)(initial volume) = (final pressure)(final volume) PV PV1 1 2 2=
(Initial volume)
(Initial temperature)
(final vo=
llume)
(final temperature)
V
T
V
T1
1
2
2
=
(Initial volume) (final volume)
(Initial moles) (final moles)=
V
n
V
n1
1
2
2
=
SOLUTIONS
Molaritymoles of soluteliter of solution
= M =molL
Ionization constant of water = hydrogen ion concentration
hydroxide ion concentration
Kw
+[H ][OH ]= −( )( )( Volume of
solution 1molarity of solution 1 =
volume of solution 2
molarity of solution 2
V M V M1 1 2 2
=)( ) ( )( )pH = −logarithm (hydrogen ion concentration) pH log[H ]= − +
THERMOCHEMISTRY
Heat gained or lost = (mass) specific heat
change in temperature
Q mc T=p∆( )( )
= enthalpy
of products − enthalpy
of reactants ∆ ∆ ∆H H H= −fo
fo(products) (reactants)
Enthalpy of reaction ( ) ( )
Page 3
STAAR CHEMISTRY REFERENCE MATERIALS
OTHER FORMULAS
Densitymass
volume=
D
m
V=
Percenterror=accepted value experimental value
accepted value
−(100)( )
Percentyield=actual yield
theoretical yield(100)( )
CONSTANTS AND CONVERSIONS
Avogadro 6.02 10 particles per mole23’s number = ×
h Planck’s constant = ×= −6.63 10 34 J ⋅ s
c = = ×speed of light 3.00 10ms
8
Kw
14ionization constant of water 1.00 10× −= =mol
L
2
alpha particle ( ) Heα = 24 neutron n= 0
1beta particle ( ) eβ = −10
standardtemperatureandpressure(STP)=0°Cand1atm
0°C=273K
volume of ideal gas at STP 22.4L
mol=
1 cm 1 mL 1 cc3 = =
1atm=760mmHg=101.3kPa
ideal gas constant 0.0821L atm
mol K8.31
L=R =
⋅
⋅=
⋅⋅
⋅=
⋅
⋅
kPa
mol K62.4
L mm Hg
mol K
1calorie(cal)=4.18joules(J)
1000calories(cal)=1Calorie(Cal)=1kilocalorie(kcal)
RULES FOR SIGNIFICANT FIGURES
)(
1.Non-zerodigitsandzerosbetweennon-zerodigitsarealwayssignificant.2. Leadingzerosarenotsignificant.3.Zerostotherightofallnon-zerodigitsareonlysignificantifadecimalpointisshown.4. Forvalueswritteninscientificnotation,thedigitsinthecoefficientaresignificant.5. Inacommonlogarithm,thereareasmanydigitsafterthedecimalpointasthereare
significantfiguresintheoriginalnumber.
Page 4
Ace
tate
C
HO
23
2−, C
HCO
O3
−
Am
mon
ium
N
H4+
Car
bon
ate
CO
32−
Chlo
rate
ClO
3−
Chlo
rite
ClO
2−
Chro
mat
eC
rO42−
Cya
nid
eC
N−
Dic
hro
mat
eC
rO
72
2−
Hyd
rogen
car
bon
ate
HC
O3−
Hyd
roxi
de
OH−
Hyp
ochlo
rite
C
lO−
Nitra
te
NO
3−
Nitrite
N
O2−
Perc
hlo
rate
ClO
4−
Perm
angan
ate
MnO
4−
Phos
phat
ePO
43−
Sulfat
eS
O42−
Sulfi
te
SO
32−
A
TER
IALS
CH
EM
ISTR
Y
M ER
EN
CE
STA
AR
f
ER
Meta
l
Lith
ium
Pota
ssiu
m
Bar
ium
Cal
cium
Sod
ium
Mag
nes
ium
Alu
min
um
Man
gan
ese
Zin
c
Chro
miu
m
Iron
Cob
alt
Nic
kel
Tin
Lead
(Hyd
rogen
)
Cop
per
Mer
cury
Silv
er
Plat
inum
Gol
d
Increasing Activity
AC
TIv
ITY
S
ER
IES
SO
Lu
bIL
ITY
Of C
OM
MO
N
ION
IC C
OM
PO
uN
dS
IN
WA
TER
So
lub
le
com
po
un
ds
con
tain
CH
O2
32−, C
HCO
O3
−
NH
4+
NO
3−
CN−
ClO−
ClO
2−
ClO
3−
ClO
4−
Br−
Cl−
I− SO
42−
Inso
lub
le
com
po
un
ds
con
tain
CO
32−
PO
43−
CrO
42−
Cr
O7
22−
OH−
S2−
Co
mm
on
exce
pti
on
s
Non
e
Non
e
Non
e
Non
e
Non
e
Non
e
Non
e
Non
e
Com
pounds
of
Ag+
,Pb
2+,an
dH
g 22+
Com
pounds
of
Ag+
,Pb
2+,an
dH
g 22+
Com
pounds
of
Ag+
,Pb
2+,an
dH
g 22+
Com
pounds
of
Sr2+,B
a2+,
Pb
2+,an
dH
g 22+
Co
mm
on
exce
pti
on
s
Com
pounds
of
NH
4+a
nd
the
alka
lim
etal
cat
ions
Com
pounds
of
NH
4+a
nd
the
alka
lim
etal
cat
ions
Com
pounds
of
NH
4+a
nd
the
alka
lim
etal
cat
ions
Com
pounds
of
NH
4+a
nd
the
alka
lim
etal
cat
ions
Com
pounds
of
NH
4+,th
eal
kali
met
alc
atio
ns,
Ca2+,S
r2+,an
dB
a2+
Com
pounds
of
NH
4+,th
eal
kali
met
alc
atio
ns,
Ca2+,S
r2+,an
dB
a2+
PO
LY
ATO
MIC
ION
S
Page 5
12 2B
13 3A14 4A
15 5A16 6A
17 7A
18 8A
1011 1B
He
Hg
CdZn
Au
Ag
Cu
PtPdNi
TlGa
PbSnGe
Bi
SbAs
PoTeSe
At
Br
RnXeKr
Al
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SC
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r
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NO
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e
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Dy Cf
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Gd
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par
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t sta
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or m
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otop
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Sili
con
14
Sym
bol
Ato
mic
num
ber
Nam
e
28.0
86A
tom
ic m
ass
InI
KC
a
Na
Mg
LiB
e2 2A
H1 1A
Sc3 3B
Ti4 4B
V5 5B
Cr6 6B
Mn7 7B
Fe8
Co9
Rb
SrY
ZrN
bM
oTc
Ru
Cs
Ba
Hf
TaW
Re
Os
FrR
aR
fD
b
Sg
Bh
Hs
Mt
Pr Pa
Nd U
Pm Np
Sm PuRh
2
804830
794729
78 110
4628
814931
825032
835133
845234
855335
865436
1314
1516
1718
56
78
910
1920
1112
34
1
2122
2324
2526
27
3738
3940
4142
4344
5556
7273
7475
76
8788
104
105
106
107
108
109
45 77
4.00
3
26.9
8228
.086
30.9
7432
.066
35.4
5339
.948
22.9
9024
.305
10.8
1212
.011
14.0
0715
.999
18.9
9820
.180
6.94
19.
012
1.00
8
65.3
863
.546
58.6
9369
.723
72.6
474
.922
78.9
679
.904
83.7
9839
.098
40.0
7844
.956
47.8
6750
.942
51.9
9654
.938
55.8
4558
.933
(281
)(2
23)
(226
)(2
67)
(268
)(2
71)
(272
)(2
70)
(276
)
112.
412
107.
868
106.
4211
4.81
811
8.71
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1.76
012
7.60
126.
904
131.
294
85.4
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88.9
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92.9
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(98)
101.
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4.38
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192.
217
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PER
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STA
AR
CH
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ISTR
Y
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ATER
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Up
da
ted
Sp
rin
g 2
011
Page 6
