New Jersey Science League
Chemistry II Exam January 2015 YELLOW TEST
Answer the following questions on the answer sheet provided. Each correct response is worth 4 points.
Use the letters in parentheses for your answers. Choose the letter that best completes or answers the item'
Be certain that erasures are complete. Please PRINT your name, school, atea #, and which test you are
takins on the scan-tron.
1. The density of marble chips is determined by water displacement method and the following
data are obtained.
Volume (mL)
Mass (e)
2.0
4.0
3.0
6.0
4.0
9.0
5.0
t2.0
6.0
15.0
10.0
25.0
"
The density of marble is 2.50 glmL. What is the closest to the percent error of the student's
experimental determination?
c.20%
B. t5%
A. s.0%
D. 83%
2. The photoelectron spectrum (PES) below shows the binding energies for all electrons in
neutral element Q.
Rsiativ* *tagber
cf r}rckaes
PES *fekroelrt Q
13*S
The element Q belongs to the Group
A.2
1** eV
ell
_
58tV
$etrr
of the periodic table.
c.14
B.5
D.
18
3. Which has the most C atoms?
A.
10.0 mg of CaCO3
B. 12.0 mg of
CaC2
C.4.0 mg of
COz
4. For which pair of species is the difference in radii the sreatest?
B. N/ and ClC. N:a* and 52A. Na and Cl
NfSL Chem II fan 2015
Page 1
D. 8.0 mg of CO
D. Cf and
52-
5. 100.0 mL of a 0.10 M Pb(NIO3)2 aq. solution is added to 100.0 mL of a 0.30 M CaCl2 aq.
solution. Which ion has the hiehest concentration in solution after the chemical reaction is
terminated?
C, CT*
B. NO:-
A. Pb2*
Cu2S + HNO:
6.
-+
CuQ.{Or)2
+
CuSOa
D. CT
+ NO2 +
HzO
When the above equation is balanced using the smallest whole-number coefficients, the
coefficient of NOz will be equal to
c.8
B. l0
A.12
D.6
.
20.0 g of M2O7 react with excess Hz according to the following equation:
MzOt + 7Hz -> 2M + THzO
If only 5.20 gof water are produced, what is the identity of the metal?
7
A. Mn
B. Mo
D. Re
C. Ru
1.00 g of CaCO:. The beaker is
heated to dryness. What is the mass of the dry residue in the beaker?
8. 250.0 mL of a 0.10 M HCI are added to a beaker containing
CaCO3(s) +2HCl(aq)
A.1.73
g
+
CaClz@q)
B. 1.11 g
+ COz@) + H2O(l)
C.1.29 g
D. 1.91 g
9. In which of the following chemical equations did the oxidation state of N remain unchanged?
A. Cu(s) + 8HNO3(aq) -+ Cu(NO:)z(aq) + 2NO(g) + }i1O(D
B.2No(g) + Ozk) -+ 2Nozk)
C. NzO:(s) + HzO(D -+ 2HNO3(aq)
-+ NzO(S) + 2HzO(s)
D. NFI+NO:(s)
10.
A compound is made of Mg,
P and O.
Which of the following compounds contains
approximately 50o/o of oxygen by mass?
B. Mg2P2O7
A. Mg3(PO4)2
11. What is the oxidation
C. Mg(PO3)2
state of phosphorus in the compound POCI3?
c.0
B. +3
A.+5
D. MgPO2
D. -3
12. Copper has two naturally occurring isotopes: copper-63 and copper-65. The average atomic
mass of copper is 63.54 amu. What is the ratio of the natural abundances of these two isotopes
(copper-63 :copper-65)?
A.2:l
NISL Chem II fan 2015
C.3:l
B. 1:3
PageZ
D.4:3
of compounds of general formula QZ(SOa)2.l2HzO
A 25.00 g sample of a certain alum is heated to drive off
metals.
where Q and Z aretwo different
the crystal water; the anhydrous residue weighs 14.264 g. Treatment of the residue with excess
NaOH precipitates all the Z as Z(OH): which weighs 5.355 g. Identify the two metals.
13. The
term'.ALUM" refers to
A. K and Al
a class
B. Na and
Al
D. K and Fe
C. K and Cr
14. Ableach sample is analyzed for its NaCIO content. It is found that a 10.0 g sample of bleach
requires 40.50 mL of 0.500 M NazSzOg solution to reach the endpoint of titration. What is the
mass percent of NaCIO in the bleach?
+
NaCIO
A.7.54%
2Na2S2O3
B.
+ 2HCl -+ 3NaCl + NazSaOo +
13.4%
H2O
D.26.4%
C.zA.l%
15. A 1.500 g sample of solid CaCO: is dissolved in 25.00 mL of 1.000 M of HCI solution. The
excess amount of HCI is titrated with 0.100 M NaOH solution. The endpoint of the titration
required 23.40 mL NaOH solution. What is the percent CaCOg in the sample?
CaCQ(s)
+ 2HCl(aq) +
CaClz@q)
16. Oxygen (Oz) and
COz(g)
+
H2O(D
C.50.8%
8.75.3%
A.96.7%
+
D.25.4%
Ozone (O3) are allotropes of the element oxygen. Which of the following
pairs is NOT an allotropic pair?
A. Cgraphite and C6irrron4
B. rhombic sulfur and amorphous sulfur
C. white tin and gray tin
D. nitrogen-I4 and nitrogen-l5
17. Green light breaks the bond between two chlorine atoms. Which of the following lights can
also break the bond between the chlorine atoms?
D. Orange
C.
B. Yellow
A. Blue
Red
18. The correct name of Cr(COz): is
A. Chromium carbonate
B. Chromium carbonite
19.
C. Chromium(Vl) carbonate
D. Chromium(Vl) carbonite
Which species canact as an oxidizingagent but NOT as a reducing agent?
B. NO:-
A. NOz
20. What is the ground
A. [Ar] 3d
NISL Chem II fan 2015
D. CIO-
C. Cu*
state electron configuration of the nickelous ion?
4s2
B.tArl
3f
4s2
Page 3
C. tArl
3l
D.
ttul 3d
4st.
21. Consider the following equation:
2CaH1s +13Oz
-+ 8COz +
10H2O
is
when 100.0 g of caHro react with 100.0 $ of 02, the maximum amount of coz produced
D. 304 g
C.194 s
8.42.3 g
A. 84.6 g
22. Consider the following reactions:
QClz@d + Z(s) -) no reaction
MrCrzi.rld +Q(s) +M(s) +QClz(s)
MClz/.rld + Z(s) + M(s) + ZCl2@q)
What is the correct order of increasing activity for the metals M, Q and Z?
A.M <Q<Z
B.M<Z<Q
c.z<Q<M
D'Z<M<Q
in acidic solutions?
23. Which of the following compounds is insoluble in pure water, but soluble
(NH+)zCO:
IV'
III'
II.
I.
AgCl
A. Only I and II
Fe(OH)g
CaCO:
B. Only II and
III
c. II, III
and
IV
D. All of these
24. Mixing which combination produces a gaseous product?
I. solid NaOH and solid NF{+NO:
II. silver metal and 6.0 M HNOI solution
III. solid CaCO: and vinegar
A. Only
I
B. only I and
II
c. only II
and
III
D. I,
il
and
III
reaction between a
25. Which of the following equations correctly represents the net ionic
solution of mercury(I) nitrate and a solution of sodium chloride?
A.Hg]. @q) + 2CI-(aq) + Hg2C12(s)
B. 2Hg\ aq) + CI'(aq) + Hg2Cl(s)
C. IFrg* (aq) + zcl- (aq) + HgCl2(s)
D.Hg2*(aq)
+ ZCl'(aq) -+ Hg2C12(s)
NISL Chem II fan 2015
Page 4
Periodic Table and Chemistry Formulas
l8
1
H
l_0079
J
Li
Periodic Table of the Elem nts
)
lamu to 5 significant digits]
4
Be
t9
K
Mg
zl
20
23
Ca
Ti
Sc
39
38
Rb
40
Y
Sr
I
6
3
Zr
V
4l
t<
24
26
Mn
Cr
Fe
u
43
42
Nb Mo
Ru
Tc
t0
9
l1
2a
27
Cu
t6
45
Rh
50
29
Ni
Co
Ag
Pd
12
49
48
Cd
In
Cs
a1
Ba
74
Lu Hf
Ta
r74.97
l8{r..x
103
88
Fr
a)
7l
56
104
105
Lr Rf Db
Ra
76
w
Os
Re
l07
106
108
Bh
Sg
Hs
77
Au 'hg
78
Ir
79
Pt
lt2
lll
110
109
t1
5t
Te
Sb
attrl
la11\
I
Ar
36
Kr
54
Xe
1l
83
Pb
t4
Bi
t5
At
Po
lt6
tt4
113
Br
5J
52
Sn
Rg Uub Uut uuq uup
Mt Ds
35
Se
Ne
l8
CI
34
As
50
F
S
33
He
4.m/26
l0
9
l7
P
a2
TI
l6
t5
Ge
119
92.906
o
rtw
32
Ga
E
N
Si
A1
31
Zn
C
l2.0lt
t4
t3
Na
7
B
t7
16
15
6
5
9.Or22
lt
l4
t3
tt7
86
Rn
ll8
atas)
Lanthanidt
Series
Actinide
Series
CHEMISTRY FORMULAS
d:la
GASES, LIQUIDS,
(P + n2a)
P4:
NRT
(V-nb)
v'
P1o14
Rota:Pe +
3kt
-
r X4
PB
m
nRT
+ Pc+
=\Fnr
M
KEp"rrol""ut": -!4y'
z
KE
pe. mole
=
n=r4
M
Kelvin:'C +273
P1V1 :
P2V2
Yr:&
Tr
T2
prvr=&_\!
Tr T2
n
:
rt@
;: \M,
Xa:
moles
: root-mean-square-root
KE: Kinetic energy
ums
rate of effusion
M: Molar mass
n: osmotic pressure
molality:
K5: molal boiling point
constant
molality
AT6:iK6omolality
n:
nRTi
V
mole Kelvin
mole Kelvin
Boltzmann's constant,
A
i = van't Hoff factor
K6: molal freezing point
ATl: iKsr
Joules
:8.31 volts coulombs
k
:
1.38
x
10-23 Joule
total moles
r:
I
MASS
M. molarity : moles solute
liter of solution
moles of solute
kg of solvent
8.3
:0.0821 liter atm
v: velocity
where
:
Mole Kelvin
number of moles
d: density
ln:
3RT
2
R, Gas constant
pressure
V: volume
T: Temperature
V
SOLUTIONS
PV:
P:
Q:
constant
reaction quotient
Eo
:
standard reduction
Keq
:
equilibrium constant
I :current in amperes
q: charge in coulombs
t: time
potential
K
Kr*"t",:
Kb
wate.
:
STP:0.00
I faraday
5
1.86 Kelvin /molal
0.512 Kelvin /molal
oC,
1.00 atm (101.3 kPa)
:96,500 coulombs/ mole of
electrons
E
:
l"
:
p
-
frequency
wavelength
momentum
ATOMTC STRUCTURE
v:
AE:hv
c=v),
L:
h
n:
mv
p:mv
h
:
c:
v:
OXIDATION-REDUCTION
ELECTROCHEMISTRY
energY
a:
velocity
where
principal quantum number
speed of light 3.00 x l0o m/s
constant
k:
: 1.38 x I 0-23 joule/K
1: qlt I :
s
-
Eert:
Avogadro's number: 6.02 x 10"
n2
Eocett
molecules/mole
e
electron charge : -l .602 x I 0-1e
coulomb
electron volt/atom = 96.5 x 1023 kj/mole
amperes, q
t:
EQUILIBRIUM
EQUILIBIRUM
K*:lxl0-t4at25oC
TERMS
pH
+ pOH:
Ko:
I
Faraday
nEo
3 :96,500 coulombs/mole
- A = kt Ao is initial concentration, amount.
hrL
A
gas pressure
11
I(:
molar
concentration
pH: pK" + toglA-l
0'0592 log O @?5'C
"K: uosgz
los
A"
weak acid
Ku: weak base
K*: water
14
charge in coulombs,
KINETICS EQUATIONS
K":
pH: -log[H*]; pOH: -log[OF]
:
dD
time in seconds.
-RM = Eo*rr nSn
:
I
lAr[Bl"
aB+ bB <+ cC+
,l
Planck's constant: 6.63 x lO-3aJoule
Boltzmann
En= -2J-78-xl-Q*n joule
LCfrDIl
AAO
= kt
=kt
tHA]
pOH:
pK6
+
IHBI
tog
"(? )=+t;;)
tBl
pKu: -logKu, PKu: -logK6
An
:
Kp: KGD^'
moles product gas
-
moles reactant
THERMOCHEMISTRY
O5o: lASo products
AHo: IAHo products
O6o: lAGo
products
- tASo reactants
-
ZAHo reactants
>AG"
reactants
AGO: AHO-TAS"
AGo: -RT lnK: -2.303 RT log K
So:
Eo:
q:
AGo
standard reduction Potential
T:
c:
Co:
1
+ 2.303 RT log Q
Hs:
Cp:
Q:
q:
AH
AT
InH1
mHu'
heat
specific heat caPacitY
molar heat caPacitY at
faraday 5 :96,500
coulombs/mole
C*ate,:4.18 joule
caT
m
temperature
q:
constant pressure
AGo: -n5Eo
AG: AGo + RT lnQ:
standard entropl'
Ho: standard enthalpy
Go: standard free energy
H,
:
330
gK
ioules for water
gram
2260
joules for water
gram
MnrnI ACUVITY
SERIES
Metal
Metal lon
Lithium
Li*t
K*t
Potassium
Calcium
Sodium
Masnesium
Ca*t
Na*'
Aluminum
Mg*'
AI
Mansanese
Mn*2
Zinc
Chromium
lron
Znt'
Lead
Copper
Mercury
Silver
Platinum
Gold
Cr*Z, Cr*'
Fe*', Fe*'
Pb*" Pb'"
Cu*t, Cu*'
Hg*'
Ag*t
Pt*t
Au*'. Au*'
d0& tr90r
tr50r tr40r
tr9r tr8r
tr41 tr3r
@
e3
39
p6
,(r)
*-
?6
@5-
er
6
E
!
@
n
m
m
,
m
6 .A' {r
I
U'=
vx
2a
n2
zo
t
rii
tn
ci
!-I
d
r
n
rn
o
:
o
z
I
N
:\
I
;=
m
7 .A= cBr
8 cA: tt
9.A= trB:
10 cA: 5
trBtr
11
12 -trAr trBr
13 trAr trBl
trBr
14
15 -trA: rD
16 trAr trBr
trBr
17 *
18.A= trBr
19 cA: r|r
20 .A= trBr
trBr
21 *
22 trAr tf
23 trAr rD
24 .A- trBr
trBr
25 *
26 .A= trBr
27 .Ar trBr
28 .A= trBr
29 .A= cBr
trBr
30.A.
31 trAr trBr
32 trAr trBr
33 .A= EBr
34 .At trBr
35 .Ar trBr
36 -A= trBr
37.A= trBr
38 -A= trBr
39 -A= trBr
40 .A. trBr
41 trAr trBr
42 trAr trBr
43 .A- trBr
44.A= trBr
45 trAr trBr
46 trAr trBr
47.A= trBl
48 .A= trBr
49 trAr trBr
50 trA:.Br
PART
1
I
tr601
tr10r
tr7- tr6r tr5r
.2a tr1: tr0r
KEY
(F)
1*trBr
2*trBr
3.A= trB:
4.A= trBr
5.A= trBr
F
a
tr80r tr70r
tr30r c201
tr3r
trCr
trCr
trCr
f
trCr
trCr
cQ:
trCr
f
trCr
rCr
f
trCr
trCr
trCr
cC:
trCr
trCr
trCr
-trCr
trCr
trCr
cQr
trCr
trCr
trCr
trCr
trCr
trCr
trCr
trCr
trCr
trC:
trCr
trC:
trCr
trCr
trCr
trCr
trCr
trCr
trCr
trC:
trCtr
trCr
trC:
trCr
trCr
trCr
*
trDr trEr
trD: trEr
EEr
tts
cD: trEr
cf:
f;
trDr trEr
cf:
ap
trDr trEr
cP: trEl
trDr trEr
trDr trE:
cD: trEr
trEr
-trD: trEr
trDr trEr
rE:
lF
trDr tr Er
trEr
ilF
trDr trEr
trDr trEr
trDr trEr
trDr trE:
trDr trEr
trE:
rlr
trDr trE:
trDr trEr
trDr trEl
trD: trEr
trDr trEr
trDr trEr
trDr trE:
trDr trEl
trDr trEr
trDr trEr
trDr trEl
trDr trEr
trDr rEl
trDr trEr
trDr trEl
trDr trEr
trDr trEr
trDr trEr
trDr trEr
trDr trEr
trDr trEr
trDr trEr
trDr trEl
trDr rEr
trDr trEr
trDr trEr
q 6s
E eA n=
#
_ m=
=il x
;P
-in
E
Emx
'to
l
3
@ofr
io3
liEP
6o+
orx
oc>
no4
im
T
eq
i ,d
8E
it EE
um
-il fi,^
=! =
i5 i"=
*H
5 9 >E
o
=m
o*= HQ
-4
o< :i <m
I
o
r'l
T
z
;
to
m
F
n
.}
r=x
|-=
q
!I
I