Introductory Chemistry: A Foundation
8th Edition
ISBN: 9781285199030
Author: Steven S. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Chapter 14, Problem 48QAP
Interpretation Introduction
Interpretation:
This should be explained why ionic solids do not conduct electricity when in solid state but are strong conductors of electricity in liquid state or in solution.
Concept Introduction:
Ionic solids have strong electrostatic force of attraction.
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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 14 Solutions
Introductory Chemistry: A Foundation
Ch. 14.2 - trong>Exercise 14.1 Calculate the total energy...Ch. 14.3 - Prob. 1CTCh. 14.6 - trong>Exercise 14.2 Name the type of crystalline...Ch. 14 - ou seal a container half-filled with water. Which...Ch. 14 - xplain the following: You add 100mLof water to a...Ch. 14 - Prob. 3ALQCh. 14 - Prob. 4ALQCh. 14 - Prob. 5ALQCh. 14 - Prob. 6ALQCh. 14 - Prob. 7ALQ
Ch. 14 - ow do the following physical properties depend on...Ch. 14 - ook at Fig. 14.2. Why doesn't temperature increase...Ch. 14 - Prob. 10ALQCh. 14 - Prob. 11ALQCh. 14 - Prob. 12ALQCh. 14 - Prob. 13ALQCh. 14 - Prob. 14ALQCh. 14 - Prob. 15ALQCh. 14 - True or false? Methane (CH4) is more likely In...Ch. 14 - Prob. 17ALQCh. 14 - Prob. 18ALQCh. 14 - Prob. 19ALQCh. 14 - Which would you predict should be larger for a...Ch. 14 - Prob. 21ALQCh. 14 - Prob. 22ALQCh. 14 - Prob. 23ALQCh. 14 - ases have (higher/lower) densities than liquids or...Ch. 14 - Prob. 2QAPCh. 14 - Prob. 3QAPCh. 14 - he enthalpy (H)of vaporization of water is about...Ch. 14 - Prob. 5QAPCh. 14 - Prob. 6QAPCh. 14 - Prob. 7QAPCh. 14 - Prob. 8QAPCh. 14 - Prob. 9QAPCh. 14 - Prob. 10QAPCh. 14 - Prob. 11QAPCh. 14 - What does the molar heat of fusion of a substance...Ch. 14 - The following data have ban collected for...Ch. 14 - The molar heat of fusion of aluminum metal is...Ch. 14 - Prob. 15QAPCh. 14 - Prob. 16QAPCh. 14 - The molar heats of fusion and vaporization for...Ch. 14 - It requires 113Jto melt 1.00gof sodium metal at...Ch. 14 - Consider the iodine monochloride molecule, ICI....Ch. 14 - Prob. 20QAPCh. 14 - Prob. 21QAPCh. 14 - Prob. 22QAPCh. 14 - Prob. 23QAPCh. 14 - Prob. 24QAPCh. 14 - What type of intermolecular forces is active in...Ch. 14 - Prob. 26QAPCh. 14 - Prob. 27QAPCh. 14 - The heats of fusion of three substances are listed...Ch. 14 - When dry ammonia gas (NH3)is bubbled into a...Ch. 14 - Prob. 30QAPCh. 14 - Prob. 31QAPCh. 14 - If you've ever opened a bottle of rubbing alcohol...Ch. 14 - Prob. 33QAPCh. 14 - Prob. 34QAPCh. 14 - Which substance in each pair would be expected to...Ch. 14 - Which substance in each pair would be expected to...Ch. 14 - Prob. 37QAPCh. 14 - Two molecules that contain the same number of each...Ch. 14 - Prob. 39QAPCh. 14 - Prob. 40QAPCh. 14 - How do ionic solids differ in structure from...Ch. 14 - A common prank on college campuses is to switch...Ch. 14 - Prob. 43QAPCh. 14 - What types of forces exist between the individual...Ch. 14 - Prob. 45QAPCh. 14 - Prob. 46QAPCh. 14 - Prob. 47QAPCh. 14 - Prob. 48QAPCh. 14 - Prob. 49QAPCh. 14 - Prob. 50QAPCh. 14 - Prob. 51APCh. 14 - Prob. 52APCh. 14 - Prob. 53APCh. 14 - Prob. 54APCh. 14 - Prob. 55APCh. 14 - Prob. 56APCh. 14 - Prob. 57APCh. 14 - Prob. 58APCh. 14 - Prob. 59APCh. 14 - Prob. 60APCh. 14 - Given the densities and conditions of ice, liquid...Ch. 14 - Prob. 62APCh. 14 - Which of the substances in each of the following...Ch. 14 - Prob. 64APCh. 14 - Prob. 65APCh. 14 - Prob. 66APCh. 14 - Prob. 67APCh. 14 - Prob. 68APCh. 14 - Describe, on both a microscopic and a macroscopic...Ch. 14 - Cake mixes and other packaged foods that require...Ch. 14 - Prob. 71APCh. 14 - Prob. 72APCh. 14 - The molar heat of vaporization of carbon...Ch. 14 - Prob. 74APCh. 14 - Prob. 75APCh. 14 - Prob. 76APCh. 14 - Prob. 77APCh. 14 - Prob. 78APCh. 14 - Prob. 79APCh. 14 - Prob. 80APCh. 14 - Prob. 81APCh. 14 - Prob. 82APCh. 14 - Prob. 83APCh. 14 - Prob. 84APCh. 14 - Describe in detail the microscopic processes that...Ch. 14 - Prob. 86APCh. 14 - Prob. 87APCh. 14 - Prob. 88APCh. 14 - Prob. 89APCh. 14 - Describe, on a microscopic basis, the processes of...Ch. 14 - Prob. 91APCh. 14 - Prob. 92APCh. 14 - Which of the following compound(s) exhibit only...Ch. 14 - Which of the following statements about...Ch. 14 - Prob. 95CPCh. 14 - Prob. 96CPCh. 14 - Prob. 97CPCh. 14 - Which of the following statements is(are) true?...
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