GENERAL ORGANIC+BIO...(LL)-W/MOD.ACCESS
3rd Edition
ISBN: 9780134466699
Author: FROST
Publisher: PEARSON
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Question
Chapter 7, Problem 2IA.6Q
Summary Introduction
To discuss:
The interaction of formaldehyde with water through dipole-dipole attractions.
Introduction:
The molecules connect to other molecules in major two states “solids” and “liquids”. The molecules connect due to the attractive forces acting among them. These forces of attraction result in the formation of physical characteristics (viscosity, melting point, and boiling point) of molecules.
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Students have asked these similar questions
(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 7 Solutions
GENERAL ORGANIC+BIO...(LL)-W/MOD.ACCESS
Ch. 7 - Prob. 7.1PPCh. 7 - Prob. 7.2PPCh. 7 - Prob. 7.3PPCh. 7 - Given that only polar molecules can participate as...Ch. 7 - Prob. 7.5PPCh. 7 - Prob. 7.6PPCh. 7 - An ion-dipole attraction often occurs when ionic...Ch. 7 - Prob. 7.8PPCh. 7 - Prob. 7.9PPCh. 7 - Prob. 7.10PP
Ch. 7 - Prob. 7.11PPCh. 7 - Prob. 7.12PPCh. 7 - Prob. 7.13PPCh. 7 - Prob. 7.14PPCh. 7 - Prob. 7.15PPCh. 7 - Prob. 7.16PPCh. 7 - Prob. 7.17PPCh. 7 - Prob. 7.18PPCh. 7 - Nitrous oxide, N2O, or laughing gas, is a common...Ch. 7 - An Ambu bag is used in emergency resuscitation....Ch. 7 - Prob. 7.21PPCh. 7 - Prob. 7.22PPCh. 7 - Prob. 7.23PPCh. 7 - As a cylinder of compressed gas empties, the...Ch. 7 - Prob. 7.25PPCh. 7 - Prob. 7.26PPCh. 7 - Prob. 7.27PPCh. 7 - Prob. 7.28PPCh. 7 - Prob. 7.29PPCh. 7 - Prob. 7.30PPCh. 7 - Prob. 7.31PPCh. 7 - Prob. 7.32PPCh. 7 - Prob. 7.33PPCh. 7 - Prob. 7.34PPCh. 7 - Prob. 7.35PPCh. 7 - What component molecules make up a triglyceride?Ch. 7 - Prob. 7.37PPCh. 7 - Prob. 7.38PPCh. 7 - Prob. 7.39PPCh. 7 - Prob. 7.40PPCh. 7 - Prob. 7.41PPCh. 7 - Prob. 7.42PPCh. 7 - Prob. 7.43APCh. 7 - Prob. 7.44APCh. 7 - Prob. 7.45APCh. 7 - Prob. 7.46APCh. 7 - Prob. 7.47APCh. 7 - Prob. 7.48APCh. 7 - Prob. 7.49APCh. 7 - Prob. 7.50APCh. 7 - Prob. 7.51APCh. 7 - Prob. 7.52APCh. 7 - Prob. 7.53APCh. 7 - Prob. 7.54APCh. 7 - A beach ball is filled with 10.0 L of air in a...Ch. 7 - Prob. 7.56APCh. 7 - Prob. 7.57APCh. 7 - Liquid nitrogen is an extremely cold liquid (196...Ch. 7 - A full cylinder of compressed gas is moved to a...Ch. 7 - Prob. 7.60APCh. 7 - Your friend breathes in 1.5 L of helium from a...Ch. 7 - Prob. 7.62APCh. 7 - Prob. 7.63APCh. 7 - Prob. 7.64APCh. 7 - Predict which member of each of the following...Ch. 7 - Predict which member of each of the following...Ch. 7 - A stain on your shirt will not come out when you...Ch. 7 - Prob. 7.68APCh. 7 - Prob. 7.69APCh. 7 - Prob. 7.70APCh. 7 - Prob. 7.71APCh. 7 - Prob. 7.72APCh. 7 - Prob. 7.73APCh. 7 - Prob. 7.74APCh. 7 - Prob. 7.75APCh. 7 - Prob. 7.76APCh. 7 - Prob. 7.77APCh. 7 - Prob. 7.78APCh. 7 - Prob. 7.79APCh. 7 - Soap, phospholipids, and cholesterol are all...Ch. 7 - Describe other components present in a cell...Ch. 7 - Prob. 7.82APCh. 7 - Prob. 7.83CPCh. 7 - Desflurane and sevoflurane are common inhalation...Ch. 7 - Prob. 7.85CPCh. 7 - Prob. 7.86CPCh. 7 - Prob. 7.87CPCh. 7 - Getem Clean, Inc. has hired you as chief chcmnt...Ch. 7 - Prob. 7.89CPCh. 7 - Prob. 1IA.1QCh. 7 - Prob. 1IA.2QCh. 7 - Prob. 1IA.3QCh. 7 - Prob. 1IA.4QCh. 7 - Prob. 1IA.5QCh. 7 - Prob. 1IA.6QCh. 7 - Prob. 1IA.7QCh. 7 - Prob. 2IA.1QCh. 7 - Prob. 2IA.2QCh. 7 - Prob. 2IA.3QCh. 7 - Prob. 2IA.4QCh. 7 - Prob. 2IA.5QCh. 7 - Prob. 2IA.6QCh. 7 - Prob. 2IA.7QCh. 7 - Devise a rule to predict the solubility of an...Ch. 7 - Prob. 1ICCh. 7 - Prob. 2ICCh. 7 - Prob. 3IC
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