Class Notes (1,017,822)
CA (584,769)
BCIT (118)
(9)
Lecture 3

BISC 102 Lecture Notes - Lecture 3: Sodium Cyanide, Elution, Roman Numerals

12 pages18 viewsFall 2014

Department
Biological Sciences
Course Code
BISC 102
Professor
testing
Lecture
3

This preview shows pages 1-3. to view the full 12 pages of the document.
ORGANIC CHEMISTRY TOPICAL:
Separations and Purifications
Test 1
Time: 22 Minutes*
Number of Questions: 17
* The timing restrictions for the science topical tests are optional. If
you are using this test for the sole purpose of content
reinforcement, you may want to disregard the time limit.
You're Reading a Preview

Unlock to view full version

Only half of the first page are available for preview. Some parts have been intentionally blurred.

MCAT
2as developed by
DIRECTIONS: Most of the questions in the following
test are organized into groups, with a descriptive
passage preceding each group of questions. Study the
passage, then select the single best answer to each
question in the group. Some of the questions are not
based on a descriptive passage; you must also select the
best answer to these questions. If you are unsure of the
best answer, eliminate the choices that you know are
incorrect, then select an answer from the choices that
remain. Indicate your selection by blackening the
corresponding circle on your answer sheet. A periodic
table is provided below for your use with the questions.
PERIODIC TABLE OF THE ELEMENTS
1
H
1.0
2
He
4.0
3
Li
6.9
4
Be
9.0
5
B
10.8
6
C
12.0
7
N
14.0
8
O
16.0
9
F
19.0
10
Ne
20.2
11
Na
23.0
12
Mg
24.3
13
Al
27.0
14
Si
28.1
15
P
31.0
16
S
32.1
17
Cl
35.5
18
Ar
39.9
19
K
39.1
20
Ca
40.1
21
Sc
45.0
22
Ti
47.9
23
V
50.9
24
Cr
52.0
25
Mn
54.9
26
Fe
55.8
27
Co
58.9
28
Ni
58.7
29
Cu
63.5
30
Zn
65.4
31
Ga
69.7
32
Ge
72.6
33
As
74.9
34
Se
79.0
35
Br
79.9
36
Kr
83.8
37
Rb
85.5
38
Sr
87.6
39
Y
88.9
40
Zr
91.2
41
Nb
92.9
42
Mo
95.9
43
Tc
(98)
44
Ru
101.1
45
Rh
102.9
46
Pd
106.4
47
Ag
107.9
48
Cd
112.4
49
In
114.8
50
Sn
118.7
51
Sb
121.8
52
Te
127.6
53
I
126.9
54
Xe
131.3
55
Cs
132.9
56
Ba
137.3
57
La *
138.9
72
Hf
178.5
73
Ta
180.9
74
W
183.9
75
Re
186.2
76
Os
190.2
77
Ir
192.2
78
Pt
195.1
79
Au
197.0
80
Hg
200.6
81
Tl
204.4
82
Pb
207.2
83
Bi
209.0
84
Po
(209)
85
At
(210)
86
Rn
(222)
87
Fr
(223)
88
Ra
226.0
89
Ac †
227.0
104
Rf
(261)
105
Ha
(262)
106
Unh
(263)
107
Uns
(262)
108
Uno
(265)
109
Une
(267)
*
58
Ce
140.1
59
Pr
140.9
60
Nd
144.2
61
Pm
(145)
62
Sm
150.4
63
Eu
152.0
64
Gd
157.3
65
Tb
158.9
66
Dy
162.5
67
Ho
164.9
68
Er
167.3
69
Tm
168.9
70
Yb
173.0
71
Lu
175.0
90
Th
232.0
91
Pa
(231)
92
U
238.0
93
Np
(237)
94
Pu
(244)
95
Am
(243)
96
Cm
(247)
97
Bk
(247)
98
Cf
(251)
99
Es
(252)
100
Fm
(257)
101
Md
(258)
102
No
(259)
103
Lr
(260)
GO ON TO THE NEXT PAGE.
You're Reading a Preview

Unlock to view full version

Only half of the first page are available for preview. Some parts have been intentionally blurred.

Separations and Purifications Test 1
KAPLAN 3
Passage I (Questions 1–7)
A student attempted to synthesize N-
phenylphthalimide according to the following reaction:
COH
O
COH
O
+ H2N
+ 2H2O
Phthalic acid Analine
N - Phenylphthalimide
O
O
C
N
C
Reaction l
Phthalic acid and aniline were heated to reflux for
one hour. Upon cooling, the mixture was dissolved in
ether and placed in a separatory funnel. The solution was
then washed with 5% aqueous Na2CO3 followed by 5%
aqueous HCl and allowed to stand over solid anhydrous
Na2SO4 for 15 minutes. The ether was then evaporated
and a solid product obtained.
The crude product was dissolved in an appropriate
hot solvent and after slowly cooling the solution, crystals
were obtained, which after filtering and drying gave a
melting point of 205¡ to 207¡C. The literature value for
the melting point of the expected product is 208¡C.
The recrystallized product was analyzed by thin layer
chromatography (TLC) and the chromatogram in Figure 1
was obtained.
spotting
point
solvent
front
Figure 1
A second student carried out the same reaction and
obtained the TLC chromatogram shown in Figure 2.
spotting
point
solvent
front
Figure 2
The solubility of the product in several solvents at
two different temperatures was also determined. These
results are presented in Table 1.
Table 1
Solvent Solubility (g/100mL)
0¡C 50¡C
Dichloromethane
1-Propanol
Water
Toluene
0.002 0.003
6.3 6.8
0.1 0.3
0.3 7.5
1. In the experiment, which of the following would have
been removed by washing the solution with sodium
carbonate?
A. Phthalic acid
B. N-Phenylphthalimide
C. Aniline
D. Water
GO ON TO THE NEXT PAGE.
You're Reading a Preview

Unlock to view full version


Loved by over 2.2 million students

Over 90% improved by at least one letter grade.