Chemistry In Context
9th Edition
ISBN: 9781259638145
Author: Fahlman, Bradley D., Purvis-roberts, Kathleen, Kirk, John S., Bentley, Anne K., Daubenmire, Patrick L., ELLIS, Jamie P., Mury, Michael T., American Chemical Society
Publisher: Mcgraw-hill Education,
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Question
Chapter 3, Problem 12Q
Interpretation Introduction
Interpretation: The Lewis structure of oxygen atom, oxygen molecule ozone, and hydroxyl radicals has to be determined.
Concept Introduction:
Lewis structure: The bonding between atoms in a molecule satisfies the octet rule of valence electrons and the lone pairs also exist in the molecule. The electron is represented as dot.
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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 3 Solutions
Chemistry In Context
Ch. 3.1 - Prob. 3.2YTCh. 3.1 - Using Equation 3.1, answer the following...Ch. 3.1 - Prob. 3.4YTCh. 3.1 - Prob. 3.5YTCh. 3.1 - Scientific Practices Energy from the Sun Examine...Ch. 3.2 - Skill Building Wavelength, Frequency, and Energy...Ch. 3.3 - Skill Building The ABCs of Solar UV a. Arrange...Ch. 3.3 - Prob. 3.9YTCh. 3.4 - Prob. 3.10YTCh. 3.4 - You Decide Exposure Examine the curve shown in...
Ch. 3.4 - Prob. 3.12YTCh. 3.4 - Prob. 3.13YTCh. 3.5 - Prob. 3.14YTCh. 3.5 - Prob. 3.15YTCh. 3.6 - Prob. 3.16YTCh. 3.7 - Draw the Lewis structure for each molecule. a. HBr...Ch. 3.7 - Prob. 3.18YTCh. 3.7 - Prob. 3.19YTCh. 3.7 - You Decide The Ozone Layer Based on the reactions...Ch. 3.8 - Prob. 3.21YTCh. 3.8 - Prob. 3.22YTCh. 3.8 - Prob. 3.23YTCh. 3.8 - Prob. 3.24YTCh. 3.9 - Prob. 3.25YTCh. 3.10 - Prob. 3.26YTCh. 3.10 - Prob. 3.27YTCh. 3.10 - Prob. 3.28YTCh. 3.10 - Prob. 3.29YTCh. 3.11 - Skill Building Particulate Classification An...Ch. 3.11 - Prob. 3.31YTCh. 3.11 - Prob. 3.32YTCh. 3.11 - Prob. 3.33YTCh. 3.11 - Scientific Practices UV Interactions with Matter...Ch. 3 - How does ozone differ from oxygen in its chemical...Ch. 3 - Prob. 2QCh. 3 - Prob. 3QCh. 3 - Prob. 4QCh. 3 - Prob. 5QCh. 3 - a. What is a Dobson unit? b. Does a reading of 320...Ch. 3 - Using the periodic table as a guide, specify the...Ch. 3 - Consider this representation of a periodic table....Ch. 3 - Give the name and symbol for the element with this...Ch. 3 - Prob. 10QCh. 3 - Assuming that the octet rule applies, draw the...Ch. 3 - Prob. 12QCh. 3 - Consider these two waves representing different...Ch. 3 - Use Figure 3.4 to specify the region of the...Ch. 3 - What determines the color of light? Describe the...Ch. 3 - Prob. 16QCh. 3 - Does all light travel at the same speed in a...Ch. 3 - Arrange these types of radiation in order of...Ch. 3 - The microwaves in home microwave ovens have a...Ch. 3 - Ultraviolet radiation is categorized as UVA, UVB,...Ch. 3 - Calculate the wavelength, in nanometers, of the...Ch. 3 - The distance from Earth to the Sun is about 1.50 ...Ch. 3 - Draw Lewis structures for any two different CFCs.Ch. 3 - Prob. 24QCh. 3 - Prob. 25QCh. 3 - Prob. 26QCh. 3 - The following free radicals all play a role in...Ch. 3 - a. How were the original measurements of increases...Ch. 3 - Prob. 29QCh. 3 - The EPA has used the slogan Ozone: Good Up High,...Ch. 3 - Nobel Laureate F. Sherwood Rowland referred to the...Ch. 3 - Prob. 32QCh. 3 - Prob. 33QCh. 3 - Prob. 34QCh. 3 - Prob. 35QCh. 3 - The average length of an OO single bond is 132 pm....Ch. 3 - Prob. 37QCh. 3 - Describe why ozone is more reactive than oxygen...Ch. 3 - Prob. 39QCh. 3 - Prob. 40QCh. 3 - Prob. 41QCh. 3 - All the reports of the damage caused by UV...Ch. 3 - Prob. 43QCh. 3 - Prob. 44QCh. 3 - Prob. 45QCh. 3 - Prob. 46QCh. 3 - Prob. 47QCh. 3 - Development of the stratospheric ozone hole has...Ch. 3 - Prob. 49QCh. 3 - Prob. 50QCh. 3 - Resonance structures can be used to explain the...Ch. 3 - Prob. 52QCh. 3 - Prob. 53QCh. 3 - Prob. 54QCh. 3 - Prob. 55QCh. 3 - Many different types of ozone generators...Ch. 3 - The effect a chemical substance has on the ozone...Ch. 3 - Cooking with an electric stove can have a negative...Ch. 3 - One mechanism that helps break down ozone in the...Ch. 3 - Polar stratospheric clouds (PSCs) play an...Ch. 3 - Prob. 61Q
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