(7) Once you put the spotted TLC plate into the solvent, you will see the solvent begin to move up the plate. How do you determine when the process is complete and the TLC plate should be taken out of the solvent?

Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter10: Fuels, Organic Chemicals, And Polymers
Section: Chapter Questions
Problem 119QRT
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chart is for 8 compounds are Ethyl acetate, hexanes, silica gel, azobenzene, 4,6,8-trimethylazulene, disperse blue 14, quinazarin green and oil red O.
MP
°C
BP
°C
Dipole
Moment
Dielectric
Constant
Common solvents
(Debyes)
1.8
3.9
3.5
3.8
(25 °C)
78.5
48.9
37.5
36.7
35.0
32.6
24.3
100
0.0
19
water
dimethylsulfoxide "DMSO"
acetonitrile
dimethylformamide "DMF"
1,3-propanediol
methanol
ethanol
189
82
-44
-61
153
214
65
78
-27
2.5
2.87
-98
-117
1.7
20.7
20.1
17.1
56
2.7
-95
-127
acetone
17
1.7
1.5
1.7
97
118
1-propanol
1-butanol
dichloromethane
tetrahydrofuran "THF"
acetic acid
ethyl acetate
chloroform
diethyl ether
benzene
carbon tetrachloride
n-hexane
90
-97
40
8.9
65
7.4
-65
17
6.2
6.0
119
1-1.5
-84
77
1.85
-64
61
1.1
4.7
4.2
2.3
2.2
1.9
-116
35
1.25
0.0
0.0
80
-23
77
69
-95
0.0
Table 1: Useful properties of pure solvents
2329
6644221
6585
Transcribed Image Text:MP °C BP °C Dipole Moment Dielectric Constant Common solvents (Debyes) 1.8 3.9 3.5 3.8 (25 °C) 78.5 48.9 37.5 36.7 35.0 32.6 24.3 100 0.0 19 water dimethylsulfoxide "DMSO" acetonitrile dimethylformamide "DMF" 1,3-propanediol methanol ethanol 189 82 -44 -61 153 214 65 78 -27 2.5 2.87 -98 -117 1.7 20.7 20.1 17.1 56 2.7 -95 -127 acetone 17 1.7 1.5 1.7 97 118 1-propanol 1-butanol dichloromethane tetrahydrofuran "THF" acetic acid ethyl acetate chloroform diethyl ether benzene carbon tetrachloride n-hexane 90 -97 40 8.9 65 7.4 -65 17 6.2 6.0 119 1-1.5 -84 77 1.85 -64 61 1.1 4.7 4.2 2.3 2.2 1.9 -116 35 1.25 0.0 0.0 80 -23 77 69 -95 0.0 Table 1: Useful properties of pure solvents 2329 6644221 6585
Styles Styles
Pane
U v ab x,
Dictate
Sensitivity
(7) Once you put the spotted TLC plate into the solvent, you will see the solvent begin to move up
the plate. How do you determine when the process is complete and the TLC plate should be
taken out of the solvent?
(8) Once you take your TLC plate out of the solvent, why should you draw the line to indicate the
solvent front quickly?
(9) Just looking at the number of polarfunctional groups in the five dye molecules used in this
experiment, make an attempt to rank them (by name) from least polar to most polar here:
Lowest polarity
highest polarity
13
500 worde
Transcribed Image Text:Styles Styles Pane U v ab x, Dictate Sensitivity (7) Once you put the spotted TLC plate into the solvent, you will see the solvent begin to move up the plate. How do you determine when the process is complete and the TLC plate should be taken out of the solvent? (8) Once you take your TLC plate out of the solvent, why should you draw the line to indicate the solvent front quickly? (9) Just looking at the number of polarfunctional groups in the five dye molecules used in this experiment, make an attempt to rank them (by name) from least polar to most polar here: Lowest polarity highest polarity 13 500 worde
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