Modified Mastering Chemistry with Pearson eText -- Standalone Access Card -- for Chemistry: Structure and Properties (2nd Edition)
2nd Edition
ISBN: 9780134565613
Author: Nivaldo J. Tro
Publisher: PEARSON
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Chapter 5, Problem 44E
Interpretation Introduction
To find:
The formal charge on the highlighted atoms
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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 5 Solutions
Modified Mastering Chemistry with Pearson eText -- Standalone Access Card -- for Chemistry: Structure and Properties (2nd Edition)
Ch. 5 - What is electronegativity? What are the periodic...Ch. 5 - Explain the difference between a pure covalent...Ch. 5 - What is meant by the percent ionic character of a...Ch. 5 - Prob. 4ECh. 5 - What is the magnitude of the dipole moment formed...Ch. 5 - What is the basic procedure for writing a covalent...Ch. 5 - How do you determine the number of electrons that...Ch. 5 - What are resonance structures? What is a resonance...Ch. 5 - Prob. 9ECh. 5 - Prob. 10E
Ch. 5 - Prob. 11ECh. 5 - Prob. 12ECh. 5 - What is bond energy?Ch. 5 - Give some examples of some typical bond lengths....Ch. 5 - Why is molecular geometry important? Cite some...Ch. 5 - According to VSEPR theory, what determines the...Ch. 5 - Name and draw the five basic electron geometries,...Ch. 5 - Explain the difference between electron geometry...Ch. 5 - List the correct electron and molecular geometries...Ch. 5 - How do you apply VSEPR theory to predict the shape...Ch. 5 - How do you determine if a molecule is polar?Ch. 5 - Why is polarity a key connection between the...Ch. 5 - Prob. 23ECh. 5 - Determine if a bond between each pair of atoms...Ch. 5 - Prob. 25ECh. 5 - Draw the Lewis structure for BrF with an arrow...Ch. 5 - Prob. 27ECh. 5 - Write the Lewis structure for each molecule. NF3...Ch. 5 - Prob. 29ECh. 5 - Write the Lewis structure for each molecule. CH2O...Ch. 5 - Prob. 31ECh. 5 - Prob. 32ECh. 5 - Write the Lewis structure for each molecule or ion...Ch. 5 - Prob. 34ECh. 5 - Write a Lewis structure that obeys the octet rule...Ch. 5 - Prob. 36ECh. 5 - Use formal charge to determine which Lewis...Ch. 5 - Prob. 38ECh. 5 - How important is this resonance structure to the...Ch. 5 - Prob. 40ECh. 5 - Prob. 41ECh. 5 - Prob. 42ECh. 5 - Determine the formal charges of the atoms shown in...Ch. 5 - Prob. 44ECh. 5 - Prob. 45ECh. 5 - Write the Lewis structure for each molecule (octet...Ch. 5 - Prob. 47ECh. 5 - Write Lewis structures for each molecule or ion....Ch. 5 - Prob. 49ECh. 5 - Write Lewis structures for each molecule or ion....Ch. 5 - List these compounds in order of increasing...Ch. 5 - Which of these compounds has the stronger...Ch. 5 - A molecule with the formula AB3 has a trigonal...Ch. 5 - A molecule with the formula AB3 has a trigonal...Ch. 5 - For each molecular geometry shown here, list the...Ch. 5 - For each molecular geometry shown here, list the...Ch. 5 - Determine the electron geometry, molecular...Ch. 5 - Determine the electron geometry, molecular...Ch. 5 - Which species has the smaller bond angle, H3O+ or...Ch. 5 - Which species has the smaller bond angle; C1O4- or...Ch. 5 - Determine the molecular geometry and draw each...Ch. 5 - Determine the molecular geometry and draw each...Ch. 5 - Determine the molecular geometry about each...Ch. 5 - Prob. 64ECh. 5 - Prob. 65ECh. 5 - Prob. 66ECh. 5 - Prob. 67ECh. 5 - Determine the geometry about each interior atom in...Ch. 5 - Explain why CO2 and CCl4 are both nonpolar even...Ch. 5 - CH3F is a polar molecule, even though the...Ch. 5 - Determine whether each molecule in Exercise 57 is...Ch. 5 - Prob. 72ECh. 5 - Determine whether each molecule or ion is polar or...Ch. 5 - Determine whether each molecule is polar or...Ch. 5 - Each compound contains both ionic and covalent...Ch. 5 - Prob. 76ECh. 5 - Carbon ring structures are common in organic...Ch. 5 - Prob. 78ECh. 5 - Prob. 79ECh. 5 - Diazomethane is a highly poisonous, explosive...Ch. 5 - Prob. 81ECh. 5 - Phosgene (Cl2CO) is a poisonous gas that was used...Ch. 5 - The cyanate ion (OCN-) and the fulminate ion...Ch. 5 - Prob. 84ECh. 5 - Prob. 85ECh. 5 - Prob. 86ECh. 5 - Prob. 87ECh. 5 - Prob. 88ECh. 5 - Prob. 89ECh. 5 - Free radicals are important in many...Ch. 5 - A compound composed of only carbon and hydrogen is...Ch. 5 - A compound composed of only carbon and chlorine is...Ch. 5 - Prob. 93ECh. 5 - The genetic code is based on four different bases...Ch. 5 - Prob. 95ECh. 5 - Prob. 96ECh. 5 - Prob. 97ECh. 5 - A 0.167-g sample of an unknown compound contains...Ch. 5 - Use the dipole moments of HF and HCI (given at the...Ch. 5 - One form of phosphorus exists as P4 molecules....Ch. 5 - A compound has the formula C8H8 and does not...Ch. 5 - Draw the Lewis structure for acetamide (CH3CONH2),...Ch. 5 - Prob. 103ECh. 5 - In the very first chapter of this book, we...Ch. 5 - Which statement best captures the fundamental idea...Ch. 5 - Prob. 106ECh. 5 - Have each member of your group represent an atom...Ch. 5 - Prob. 108ECh. 5 - Prob. 109ECh. 5 - Prob. 110ECh. 5 - Pass a piece of paper around the group and ask...Ch. 5 - Prob. 112ECh. 5 - At least two different numbers of electron groups...Ch. 5 - Prob. 114ECh. 5 - The VSEPR model is useful in predicting bond...Ch. 5 - Which set of elements is arranged in order of...Ch. 5 - Prob. 2SAQCh. 5 - Which pair of atoms forms the most polar bond? C...Ch. 5 - Which pair of atoms forms a nonpolar covalent...Ch. 5 - Prob. 5SAQCh. 5 - Prob. 6SAQCh. 5 - Prob. 7SAQCh. 5 - Prob. 8SAQCh. 5 - Prob. 9SAQCh. 5 - Prob. 10SAQCh. 5 - Prob. 11SAQCh. 5 - Predict the relative bond angles in BF3 and SO2Ch. 5 - Predict the molecular geometry about N in the...Ch. 5 - Which molecule is polar?
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