Bundle: Chemistry: The Molecular Science, 5th, Loose-Leaf + OWLv2 with Quick Prep 24-Months Printed Access Card
5th Edition
ISBN: 9781305367487
Author: John W. Moore, Conrad L. Stanitski
Publisher: Cengage Learning
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Chapter 8, Problem 107QRT
Interpretation Introduction
Interpretation:
A graph representing the distribution of molecular speeds for
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(a
4 shows scanning electron microscope (SEM) images of extruded
actions of packing bed for two capillary columns of different diameters,
al 750 (bottom image) and b) 30-μm-i.d. Both columns are packed with the
same stationary phase, spherical particles with 1-um diameter.
A) When the columns were prepared, the figure shows that the column with
the larger diameter has more packing irregularities. Explain this observation.
B) Predict what affect this should have on band broadening and discuss your
prediction using the van Deemter terms.
C) Does this figure support your explanations in application question 33?
Explain why or why not and make any changes in your answers in light of
this figure.
Figure 4 SEM images of
sections of packed columns
for a) 750 and b) 30-um-i.d.
capillary columns.³
fcrip
= ↓ bandwidth Il temp
32. What impact (increase, decrease, or no change) does each of the following conditions have on the individual
components of the van Deemter equation and consequently, band broadening?
Increase temperature
Longer column
Using a gas mobile phase
instead of liquid
Smaller particle stationary phase
Multiple Paths
Diffusion
Mass Transfer
34. Figure 3 shows Van Deemter plots for a solute molecule using different column inner diameters (i.d.).
A) Predict whether decreasing the column inner diameters increase or decrease bandwidth.
B) Predict which van Deemter equation coefficient (A, B, or C) has the greatest effect on increasing or
decreasing bandwidth as a function of i.d. and justify your answer.
Figure 3 Van Deemter plots for hydroquinone using different column inner diameters (i.d. in μm). The data was
obtained from liquid chromatography experiments using fused-silica capillary columns packed with 1.0-μm particles.
35
20
H(um)
큰 20
15
90
0+
1500
100
75
550
01
02
594
05
μ(cm/sec)
30
15
10
Chapter 8 Solutions
Bundle: Chemistry: The Molecular Science, 5th, Loose-Leaf + OWLv2 with Quick Prep 24-Months Printed Access Card
Ch. 8.1 - Prob. 8.1PSPCh. 8.1 - Prob. 8.1ECh. 8.1 - Prob. 8.2ECh. 8.2 - Prob. 8.3CECh. 8.2 - Prob. 8.4CECh. 8.3 - Prob. 8.6CECh. 8.3 - Prob. 8.2PSPCh. 8.3 - Prob. 8.3PSPCh. 8.3 - Prob. 8.4PSPCh. 8.3 - Prob. 8.7CE
Ch. 8.4 - Prob. 8.5PSPCh. 8.4 - Prob. 8.8CECh. 8.4 - Prob. 8.9CECh. 8.4 - Prob. 8.6PSPCh. 8.4 - Prob. 8.10CECh. 8.5 - Prob. 8.7PSPCh. 8.5 - Prob. 8.8PSPCh. 8.5 - Prob. 8.11ECh. 8.6 - Prob. 8.9PSPCh. 8.6 - Prob. 8.12CECh. 8.6 - Prob. 8.13ECh. 8.6 - Prob. 8.10PSPCh. 8.6 - Prob. 8.11PSPCh. 8.7 - Prob. 8.12PSPCh. 8.7 - Prob. 8.14ECh. 8.7 - Prob. 8.16CECh. 8.7 - Prob. 8.17ECh. 8.8 - Prob. 8.13PSPCh. 8.8 - Prob. 8.18ECh. 8.8 - Look up the van der Waals constants, b, for H2,...Ch. 8.11 - List as many natural sources of CO2 as you can,...Ch. 8.11 - Prob. 8.21ECh. 8.11 - Prob. 8.22CECh. 8.11 - Prob. 8.23CECh. 8.11 - Prob. 8.24CECh. 8.12 - Make these conversions for atmospheric...Ch. 8.12 - Prob. 8.25ECh. 8 - In a typical automobile engine, a gasoline...Ch. 8 - Prob. 1QRTCh. 8 - Prob. 2QRTCh. 8 - Prob. 3QRTCh. 8 - Prob. 4QRTCh. 8 - Prob. 5QRTCh. 8 - Prob. 6QRTCh. 8 - Prob. 7QRTCh. 8 - Prob. 8QRTCh. 8 - Prob. 9QRTCh. 8 - Prob. 10QRTCh. 8 - Prob. 11QRTCh. 8 - Prob. 12QRTCh. 8 - Prob. 13QRTCh. 8 - Prob. 14QRTCh. 8 - Prob. 15QRTCh. 8 - Prob. 16QRTCh. 8 - Prob. 17QRTCh. 8 - Prob. 18QRTCh. 8 - Some butane, the fuel used in backyard grills, is...Ch. 8 - Prob. 20QRTCh. 8 - Suppose you have a sample of CO2 in a gas-tight...Ch. 8 - Prob. 22QRTCh. 8 - Prob. 23QRTCh. 8 - Prob. 24QRTCh. 8 - A sample of gas occupies 754 mL at 22 C and a...Ch. 8 - Prob. 26QRTCh. 8 - Prob. 27QRTCh. 8 - Prob. 28QRTCh. 8 - Prob. 29QRTCh. 8 - Prob. 30QRTCh. 8 - Prob. 31QRTCh. 8 - Prob. 32QRTCh. 8 - Calculate the molar mass of a gas that has a...Ch. 8 - Prob. 34QRTCh. 8 - Prob. 35QRTCh. 8 - Prob. 36QRTCh. 8 - Prob. 37QRTCh. 8 - Prob. 38QRTCh. 8 - Prob. 39QRTCh. 8 - Prob. 40QRTCh. 8 - Prob. 41QRTCh. 8 - Prob. 42QRTCh. 8 - Prob. 43QRTCh. 8 - Prob. 44QRTCh. 8 - Prob. 45QRTCh. 8 - Prob. 46QRTCh. 8 - Prob. 47QRTCh. 8 - Prob. 48QRTCh. 8 - The build-up of excess carbon dioxide in the air...Ch. 8 - Prob. 50QRTCh. 8 - Prob. 51QRTCh. 8 - Prob. 52QRTCh. 8 - Prob. 53QRTCh. 8 - Prob. 54QRTCh. 8 - Prob. 55QRTCh. 8 - Benzene has acute health effects. For example, it...Ch. 8 - The mean fraction by mass of water vapor and cloud...Ch. 8 - Acetylene can be made by reacting calcium carbide...Ch. 8 - Prob. 59QRTCh. 8 - You are given two flasks of equal volume. Flask A...Ch. 8 - Prob. 61QRTCh. 8 - Prob. 62QRTCh. 8 - Prob. 63QRTCh. 8 - Prob. 64QRTCh. 8 - Prob. 65QRTCh. 8 - Prob. 66QRTCh. 8 - Prob. 67QRTCh. 8 - Prob. 68QRTCh. 8 - Prob. 69QRTCh. 8 - Prob. 70QRTCh. 8 - Prob. 71QRTCh. 8 - Prob. 72QRTCh. 8 - Prob. 73QRTCh. 8 - Prob. 74QRTCh. 8 - Prob. 75QRTCh. 8 - Prob. 76QRTCh. 8 - Prob. 77QRTCh. 8 - Prob. 78QRTCh. 8 - Prob. 79QRTCh. 8 - Prob. 80QRTCh. 8 - Prob. 81QRTCh. 8 - Prob. 82QRTCh. 8 - Prob. 83QRTCh. 8 - Prob. 84QRTCh. 8 - Prob. 85QRTCh. 8 - Name a favorable effect of the global increase of...Ch. 8 - Prob. 87QRTCh. 8 - Assume that limestone, CaCO3, is used to remove...Ch. 8 - Prob. 89QRTCh. 8 - Prob. 90QRTCh. 8 - Prob. 91QRTCh. 8 - Prob. 92QRTCh. 8 - Prob. 93QRTCh. 8 - Prob. 94QRTCh. 8 - Prob. 95QRTCh. 8 - Prob. 96QRTCh. 8 - Prob. 97QRTCh. 8 - Prob. 98QRTCh. 8 - Prob. 99QRTCh. 8 - Prob. 100QRTCh. 8 - Prob. 101QRTCh. 8 - Prob. 102QRTCh. 8 - Prob. 103QRTCh. 8 - Prob. 104QRTCh. 8 - Prob. 105QRTCh. 8 - Prob. 106QRTCh. 8 - Prob. 107QRTCh. 8 - Prob. 108QRTCh. 8 - Prob. 109QRTCh. 8 - Consider these four gas samples, all at the same...Ch. 8 - Prob. 111QRTCh. 8 - Prob. 112QRTCh. 8 - Prob. 113QRTCh. 8 - Prob. 114QRTCh. 8 - Prob. 115QRTCh. 8 - Prob. 116QRTCh. 8 - Prob. 117QRTCh. 8 - Prob. 118QRTCh. 8 - Prob. 119QRTCh. 8 - Prob. 120QRTCh. 8 - Prob. 121QRTCh. 8 - Prob. 122QRTCh. 8 - Prob. 123QRTCh. 8 - Prob. 124QRTCh. 8 - Prob. 125QRTCh. 8 - Prob. 126QRTCh. 8 - Prob. 127QRTCh. 8 - Prob. 128QRTCh. 8 - Prob. 129QRTCh. 8 - Prob. 8.ACPCh. 8 - Prob. 8.BCP
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