Introductory Chemistry (5th Edition) (Standalone Book)
5th Edition
ISBN: 9780321910295
Author: Nivaldo J. Tro
Publisher: PEARSON
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Chapter 18, Problem 64E
Complete the table.
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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 18 Solutions
Introductory Chemistry (5th Edition) (Standalone Book)
Ch. 18 - Prob. 1SAQCh. 18 - Q2. What is the correct formula for the alkane...Ch. 18 - Which structure is not an isomer of...Ch. 18 - Prob. 4SAQCh. 18 - Prob. 5SAQCh. 18 - Name the compound. a. 2-methyI-3-pentene b....Ch. 18 - Prob. 7SAQCh. 18 - Prob. 8SAQCh. 18 - Prob. 9SAQCh. 18 - Prob. 10SAQ
Ch. 18 - Prob. 1ECh. 18 - Prob. 2ECh. 18 - Prob. 3ECh. 18 - 4. What is vitalism? How was vitalism usurped?
Ch. 18 - Prob. 5ECh. 18 - Prob. 6ECh. 18 - Prob. 7ECh. 18 - 8. What are the four different types of...Ch. 18 - Prob. 9ECh. 18 - Prob. 10ECh. 18 - 11. Explain the difference between n-alkanes and...Ch. 18 - Prob. 12ECh. 18 - Prob. 13ECh. 18 - Prob. 14ECh. 18 - Prob. 15ECh. 18 - What are alkane substitution reactions? Provide an...Ch. 18 - 17. What is an alkene addition reaction? Provide...Ch. 18 - Prob. 18ECh. 18 - Prob. 19ECh. 18 - Prob. 20ECh. 18 - 21. What is the generic structure of alcohols?...Ch. 18 - Prob. 22ECh. 18 - Prob. 23ECh. 18 - Prob. 24ECh. 18 - Prob. 25ECh. 18 - Prob. 26ECh. 18 - Prob. 27ECh. 18 - Prob. 28ECh. 18 - Prob. 29ECh. 18 - Prob. 30ECh. 18 - Prob. 31ECh. 18 - Prob. 32ECh. 18 - Prob. 33ECh. 18 - Prob. 34ECh. 18 - Prob. 35ECh. 18 - Prob. 37ECh. 18 - Prob. 38ECh. 18 - Prob. 39ECh. 18 - Prob. 40ECh. 18 - Prob. 41ECh. 18 - Prob. 42ECh. 18 - Prob. 43ECh. 18 - Name each alkane.Ch. 18 - Prob. 45ECh. 18 - Prob. 46ECh. 18 - Determine what is wrong with the name of each...Ch. 18 - Determine what is wrong with the name of each...Ch. 18 - Prob. 49ECh. 18 - Prob. 50ECh. 18 - Prob. 51ECh. 18 - Prob. 52ECh. 18 - Prob. 53ECh. 18 - Prob. 54ECh. 18 - Prob. 55ECh. 18 - 56. Name each alkane.
Ch. 18 - Prob. 57ECh. 18 - Prob. 58ECh. 18 - Prob. 59ECh. 18 - Prob. 60ECh. 18 - Prob. 61ECh. 18 - Prob. 62ECh. 18 - Prob. 63ECh. 18 - Complete the table.Ch. 18 - Prob. 65ECh. 18 - Prob. 66ECh. 18 - Prob. 67ECh. 18 - Prob. 68ECh. 18 - Prob. 69ECh. 18 - Prob. 70ECh. 18 - Prob. 71ECh. 18 - Prob. 72ECh. 18 - Prob. 73ECh. 18 - Prob. 74ECh. 18 - Name each monosubstituted benzene.Ch. 18 - Prob. 76ECh. 18 - Prob. 77ECh. 18 - Prob. 78ECh. 18 - Prob. 79ECh. 18 - Prob. 80ECh. 18 - Prob. 81ECh. 18 - Prob. 82ECh. 18 - Based on its functional group, match the structure...Ch. 18 - Prob. 84ECh. 18 - Prob. 85ECh. 18 - Prob. 86ECh. 18 - Prob. 87ECh. 18 - Prob. 88ECh. 18 - Prob. 89ECh. 18 - Draw a structure for each alcohol. a. 1-hexanol b....Ch. 18 - Prob. 91ECh. 18 - Prob. 92ECh. 18 - Prob. 93ECh. 18 - For each compound, provide a name if the structure...Ch. 18 - Prob. 95ECh. 18 - Prob. 96ECh. 18 - Prob. 97ECh. 18 - Prob. 98ECh. 18 - Prob. 99ECh. 18 - Prob. 100ECh. 18 - Prob. 101ECh. 18 - Prob. 102ECh. 18 - Identify each organic compound as an alkane,...Ch. 18 - Prob. 104ECh. 18 - 105. Name each compound.
Ch. 18 - Name each compound.Ch. 18 - Prob. 107ECh. 18 - Prob. 108ECh. 18 - Prob. 109ECh. 18 - Prob. 110ECh. 18 - Prob. 111ECh. 18 - How many kilograms of CO2 are produced by the...Ch. 18 - Prob. 113ECh. 18 - Prob. 114ECh. 18 - Prob. 115ECh. 18 - Prob. 116E
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