Chemistry
4th Edition
ISBN: 9780078021527
Author: Julia Burdge
Publisher: McGraw-Hill Education
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Chapter 24, Problem 2SEPP
Interpretation Introduction
Interpretation:
The correct reason for adding dietary iodine to the table saltis to be determined out of the given options.
Concept Introduction:
Lack of iodine in our daily diet can lead to its deficiency, causing a thyroid disorder known as goiter.
Addition of small amounts of salts of iodine (
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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 24 Solutions
Chemistry
Ch. 24 - Prob. 1QPCh. 24 - Prob. 2QPCh. 24 - Prob. 3QPCh. 24 - Prob. 4QPCh. 24 - Prob. 5QPCh. 24 - Describe two laboratory and two industrial...Ch. 24 - Prob. 7QPCh. 24 - Prob. 8QPCh. 24 - Prob. 9QPCh. 24 - Prob. 10QP
Ch. 24 - Elements number 17 and 20 form compounds with...Ch. 24 - Give an example of hydrogen as (a) an oxidizing...Ch. 24 - Prob. 13QPCh. 24 - Prob. 14QPCh. 24 - Prob. 15QPCh. 24 - Prob. 16QPCh. 24 - Prob. 17QPCh. 24 - Prob. 18QPCh. 24 - Prob. 19QPCh. 24 - Prob. 20QPCh. 24 - Briefly discuss the preparation and properties of...Ch. 24 - Prob. 22QPCh. 24 - Prob. 23QPCh. 24 - Prob. 24QPCh. 24 - Prob. 25QPCh. 24 - Prob. 26QPCh. 24 - Prob. 27QPCh. 24 - Prob. 28QPCh. 24 - Prob. 29QPCh. 24 - Prob. 30QPCh. 24 - 24.31 Sodium hydroxide is hygroscopic-that is. it...Ch. 24 - Prob. 32QPCh. 24 - Prob. 33QPCh. 24 - 24.34 Describe a laboratory and an industrial...Ch. 24 - Prob. 35QPCh. 24 - Prob. 36QPCh. 24 - Prob. 37QPCh. 24 - Prob. 38QPCh. 24 - Prob. 39QPCh. 24 - Prob. 40QPCh. 24 - Prob. 41QPCh. 24 - Prob. 42QPCh. 24 - Prob. 43QPCh. 24 - Prob. 44QPCh. 24 - Prob. 45QPCh. 24 - Prob. 46QPCh. 24 - Prob. 47QPCh. 24 - Prob. 48QPCh. 24 - Prob. 49QPCh. 24 - Prob. 50QPCh. 24 - Prob. 51QPCh. 24 - Prob. 52QPCh. 24 - Prob. 53QPCh. 24 - Prob. 54QPCh. 24 - Prob. 55QPCh. 24 - Prob. 56QPCh. 24 - Describe one industrial and one laboratory...Ch. 24 - Prob. 58QPCh. 24 - Prob. 59QPCh. 24 - Prob. 60QPCh. 24 - Prob. 61QPCh. 24 - Prob. 62QPCh. 24 - Prob. 63QPCh. 24 - Prob. 64QPCh. 24 - Prob. 65QPCh. 24 - Prob. 66QPCh. 24 - Prob. 67QPCh. 24 - Prob. 68QPCh. 24 - Prob. 69QPCh. 24 - Prob. 70QPCh. 24 - Prob. 71QPCh. 24 - Prob. 72QPCh. 24 - Prob. 73QPCh. 24 - Prob. 74QPCh. 24 - Prob. 75QPCh. 24 - 24.76 Describe two reactions in which sulfuric...Ch. 24 - Prob. 77QPCh. 24 - Prob. 78QPCh. 24 - Prob. 79QPCh. 24 - Prob. 80QPCh. 24 - Prob. 81QPCh. 24 - Prob. 82QPCh. 24 - Prob. 83QPCh. 24 - Prob. 84QPCh. 24 - Prob. 85QPCh. 24 - Prob. 86QPCh. 24 - Prob. 87QPCh. 24 - Prob. 88QPCh. 24 - Prob. 89APCh. 24 - Prob. 90APCh. 24 - Prob. 91APCh. 24 - Prob. 92APCh. 24 - Prob. 93APCh. 24 - Prob. 94APCh. 24 - Prob. 95APCh. 24 - 24.96 Consider the Frasch process, (a) How is it...Ch. 24 - Prob. 97APCh. 24 - Prob. 98APCh. 24 - Prob. 99APCh. 24 - Life evolves to adapt to its environment. In this...Ch. 24 - Prob. 101APCh. 24 - Prob. 102APCh. 24 - Prob. 103APCh. 24 - Prob. 104APCh. 24 - Prob. 1SEPPCh. 24 - Prob. 2SEPPCh. 24 - Prob. 3SEPPCh. 24 - Prob. 4SEPP
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