TEST 4, VERSION A
CHEM 1110.24492
Spring 2016, Dr. Potts
Put your NAME, TEST VERSION, and ALL YOUR ANSWERS on the SCANTRON and submit the scantron
for grading. Do not wait until the end of the test to transfer your answers.
lA
VIllA
~
I
2
He
H
llA
1.008
3
2
4
Li
6.94
11
3
6
B
Mg
22.99 24.31
VIA
VllA
4.00
10
9
F
0
Ne
10.81 12.01 14.01 16.00 19.00 20.18
5
Be
9.01
12
Na
VA
IVA
lllA
lliB
lVB
VB
VIB
Y!1ll!_
VliiB
m
liB
7
c
8
N
13
14
15
16
17
18
p
AI
Si
s
a Ar
26.98 28.09 30.97 32.06 35.45 39.95
4
19
20
21
22
23
24
25
26
27
32
33
34
35
28
29
30
31
36
1i
Sc
v Cr M.- Fe Co Ni Cu Zn Ga Ge As Se Br Kr
Ca
39.10 40.08 44.96 47.90 50.94 52.00 54.~ 55.85 58.93 58.71 63.55 65.37 69.72 72.59 74.92 78.96 79.90 83.80
5
49
39
40
41
42
43
45
50
52
53
37
38
44
46
47
48
51
54
y
Pd Ag
Sr
Zr
Nb Mo Tc
Ru
Rh
Jn
Sn
Sb
Te
I
Rb
Cd
Xe
85.47 87.62 88.91 91.22 92.91 95.94 [9lij 101.1 102.9 106.4 107.9 112.40 114.8 118.7 121.8 127.60 126.90 131.30
6
55
56
72
73
74
75
76
77
78
79
83
84
85
80
81
82
86
ITI
Ba Lu Hf
Ta
Cs
w Re Os Ir Pt Au Hg 'll Pb Bi Po At Rn
132.9 137.3 175 178.5 181 183.9 1862 190.2 192.2 195.1 197 200.59 204.4 207.2 209 [209] [210] [222]
7
87
88
103
104
105
106 107 108
109 110 Ill
112
113
114
115
116
Lr
Db Sg B~ Hs Mt Ds Rg Uub Uut Uuq Uup Uuh
Fr
Rf
Ra
[223] [226] [2621 1267] [268] [271] [274] [270] [2761 [2811 [2801 [285] [284] [289] [2881 [293]
K
57
58
59
60
61
62
63
65
64
67
68
69
70
66
Nd Pm Sm Eu Gd 1b Dy
La
Ce
Pr
Ho
Tm Yb
Er
138.9 140.1 140.9 144.2 fl45l 15M 152 157.3 158.9 162.5 164.93 167.3 168.9 173
89
90
Ac
Th
_{227}
232
91
Pa
92
93
u
12311 238
95
97
96
98
99
100 101
102
Am Cm
Bk a
Fm Md No
Es
[2371 [2441 .[2431 [2471 [2471 [251] [252] [257] [258] [259]
Np
94
Pu
Test 4, Version A, Page 1
118
Uuo
[294]
Part I (60pts). 15 multiple-choice questions worth 4 points each. Choose the best answer from the options given,
and record your final answer on vour scantron.
1.
A
What is the process in which molecu~es undergo a phase change directly from the solid phase to the gas
i:&ase?
~ sublimation
B. deposition
C. freezing
D. condensation
E. melting
2. ~ich of the following is a weak acid?
HF
B. HBr
C. BCl
A \!Y
D.
HN03
E.
H2S04
3.
Which is the net ionic equation for tqe reaction between aqueous solutions of LiOH and HBr?
A. Lt(aq) + Oir(aq)+ H+(aq) + Brlaq) ~ H20(/) + LiBr(aq)
@ H+(aq) + Oir(aq) ~ H20(/)
C. LiOH(aq) ~ Li+(aq) + Oir(aq)
D. HBr(aq) ~ W(aq) + Br-(aq)
E. Lt(aq) + Br-(aq) ~ LiBr(aq)
4.
If aqueous solutions of ammonium suilfide and copper(ll) nitrate are mixed, which insoluble precipitate is
formed?
A. Cu2S
B. NH.tN03
C. CuS04
CuS
E. NH.t(N03)2
D
5.
:B6.
C
{j
@
If aqueous solutions of~03 and 8aCh are mixed, which insoluble precipitate is formed?
A. Ba2C03
(..!Y BaC03
C. NaCh
D. BaO
E.
NaCl
Based on the solubility rules, which off these processes will occur if solutions ofCuS04(aq) and BaCb(aq)
are mixed?
A. No precipitate will form.
B. CuCh will precipitate; Ba2+ and sol- are spectator ions.
2
C. CuS04 will precipitate; Ba + and C.r are spectator ions.
2
D. BaCh will precipitate; Cu + and sol- are spectator ions.
BaS04 will precipitate; Cu2+ and Cr are spectator ions.
@
7.
Based on the solubility rules, which one of these compounds is soluble in water?
A. Ag2S
@ Na2S
C. A~C03
D. Hg2Ch
8.
The location that indicates conditions :unde~hich two phases can exist in equilibrium is called the
A. transition state. B. phase diagram. !£;) phase boundary. D. critical point. E. triple point.
9.
What is the net ionic equation if sodium sulfate is mixed with barium hydroxide?
Ba2+(aq) +sol- (aq) ~ BaS04(s)
B. 2Ba\aq) +sol- (aq) ~ Ba2S04(s)
C. Na+(aq) + Oir(aq) ~ NaOH(s)
D. Ba2+(aq) + 20Ir(aq) ~ Ba(OH)2(!S)
E. 2Na+(aq) + SOl-(aq) ~ Na2S04(s)
v
c
A
10.
\>11.
p
@
Which of the following gases effuses most rapidly?
A. N2
B. 02
C. HCl
QYNH3
E.
CO
What name is given to the phenomenop where a thin film of water contracts and adheres to the wall of a
glass cylinder?
A. Cohesion B. Polarity
C. Surf~ce tension
@capillary action
E. Adhesion
Test 4, Version A, Page 2
12. ~sed on the solubility rules, which one of these compounds is insoluble in water?
AgBr
B. NaCl
C. ZnC}z
D. MgBr2
E.
A
0J
13.
C
C
FeCh
The distinguishing characteristic of ~11 electrolyte solutions is that they
A. contain molecules.
D. conduct heat.
~ react with other solutions.
E. always contain acids.
© conduct electricity.
Based on the solubility rules, which ~me mhese compounds is soluble in water?
A. PbS04
B. CaS04
(SJ K2S04
D. BaS04
14.
15. ~ch chemical equation describes~ acid-base neutralization reaction?
0) LiOH(aq) + HN03(aq) ~ LiN031(aq) + H20(/)
B. 2Al(s)+ 3H2S04(aq) ~ Ah (S04)3 (aq) + 3H2(g)
C. 2KBr(aq) + C}z(g) ~ 2KC1(aq) -ti- Br2(/)
D. 2S02(g) + 2H20(l) + 02(g) ~ 2B2S04(aq)
E. CaBr2(aq) + H2S04(aq) ~ CaS04(s) + 2HBr(g)
A
Part 2 (40pts). Calculations: Clearly (and le2ibly) show all work on the blank space on the scantron answer sheet
for full credit. Do not wait until the end of the test to transfer your answers.
1. (10 pts) A sample of gas has an init~al volume of5.65 Lata pressure of735 mmHg. If the volume ofthe
/~s}s increased of9.45 L, what is its new pressure in mmHg?
~~~
,..l'fY.
-ri-.7
?~:; ~.:: ( 6 .l91?1-)[-:r35 ~r)\l4j) ~L[ff~q-3~9rn
rn-·r-.
AI'~
v1.-
L-"' 'J -
q, 4 5 I-
2. (10 pts) A chemist wants to make 5~50 L of a 0.300 M CaCh solution? What mass in grams should the
chemist use? (MM ofCaCh = 110.~8 g/mol) 5, 50 L. 0 1 3 oD IYI ol / ,_
??
J
5·50)...--)1 o.3oo~x JJO.'/'BJ..I.'ae.Pz__ -::;}!83'3
~
&U /
n
/~z_ {_
{/2-3. ( 10 pts) Methanol gas can be synthe~ized by the reaction below. What volume of methanol gas is produced
if2.5L of CO is reacted with 3.5 L ~fH2 at constant pressure and temperature?
L-12 y ro 'p le..m
2
3.? 1.?? 'COI(g) + 2 H2 (g) 7 CH30H (g)
.st.
ci
I L- Ci.LbLL
2 .tJ L. CO >1 I L--
n;::
~.Lj... H.,_x
~H:JDI::}- ~){, 8 L
1'£- ? ,_ H2-
'2.. 5 L C-H30H
c.lt3CH-
;.J - j
t-.-R
4. (10 pts) Oxygen gas reacts with po~dered aluminum to make aluminum oxide according to the balanced
reaction below. What mass of al~inum oxide is produced if 2. 75 L of 0 2 at 1.00 atm and 298K is
reacted with excess aluminum? (MM of A}z03 = 101.96 g/mol)
?V ~ n \<.~f)O li-hYl Y .::1-5 ~))
2
n= pv :::~
Yif Lv, o82-l ~~'j_z CffJ ~)
Y\
~
.
Qll2.
)
YYW
4
A~ (s) + 3 02 (g) 7
.
z.:f5L.
~1~~
~ yn_j)\ A)t-~ X
0
2. )l
_j iY\.0 )
()a_
2 A}z03 (s)
ICI /liP
Test 4, vefi#1,1Ja
??d-
)2-03
)_4 ~ 03
I
_