Chemistry: Structure and Properties (2nd Edition)
2nd Edition
ISBN: 9780134293936
Author: Nivaldo J. Tro
Publisher: PEARSON
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Chapter 19, Problem 6E
Interpretation Introduction
To determine: The difference in
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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 19 Solutions
Chemistry: Structure and Properties (2nd Edition)
Ch. 19 - Prob. 1ECh. 19 - Explain the difference between a voltaic (or...Ch. 19 - Prob. 3ECh. 19 - Prob. 4ECh. 19 - Prob. 5ECh. 19 - Prob. 6ECh. 19 - What is the definition of the standard cell...Ch. 19 - Describe the basic features of a cell diagram (or...Ch. 19 - Why do some electrochemical cells employ inert...Ch. 19 - Describe the standard hydrogen electrode (SHE) and...
Ch. 19 - How is the cell potential of an electrochemical...Ch. 19 - Prob. 12ECh. 19 - Prob. 13ECh. 19 - How can Table 19.1be used to predict whether or...Ch. 19 - Explain why Ecell , Grxn , and K are all...Ch. 19 - Does a redox reaction with a small equilibrium...Ch. 19 - How does Ecell depend on the concentrations of the...Ch. 19 - Prob. 18ECh. 19 - What is a concentration electrochemical cell?Ch. 19 - What are the anode and cathode reactions in a...Ch. 19 - What are the anode and cathode reactions in a...Ch. 19 - Prob. 22ECh. 19 - What is a fuel cell? What is the most common type...Ch. 19 - The anode of an electrolytic cell must be...Ch. 19 - What species is oxidized, and what species is...Ch. 19 - If an electrolytic cell contains a mixture of...Ch. 19 - Why does the electrolysis of an aqueous sodium...Ch. 19 - What is overvoltage in an electrochemical cell?...Ch. 19 - How is the amount of current flowing through an...Ch. 19 - Prob. 30ECh. 19 - Prob. 31ECh. 19 - Prob. 32ECh. 19 - Balance each redox reaction occurring in acidic...Ch. 19 - Prob. 34ECh. 19 - Balance each redox reaction occurring in acidic...Ch. 19 - Prob. 36ECh. 19 - Prob. 37ECh. 19 - Balance each redox reaction occurring in basic...Ch. 19 - Prob. 39ECh. 19 - Prob. 40ECh. 19 - Calculate the standard cell potential for each of...Ch. 19 - Prob. 42ECh. 19 - Consider the voltaic cell: Determine the direction...Ch. 19 - Prob. 44ECh. 19 - Use line notation to represent each...Ch. 19 - Use line notation to represent each...Ch. 19 - a sketch of the voltaic cell represented by the...Ch. 19 - Prob. 48ECh. 19 - Determine whether or not each redox reaction...Ch. 19 - Prob. 50ECh. 19 - Which metal could you use to reduce Mn2+ ions but...Ch. 19 - Prob. 52ECh. 19 - Prob. 53ECh. 19 - Prob. 54ECh. 19 - Prob. 55ECh. 19 - Prob. 56ECh. 19 - Calculate Ecell for each balanced redox reaction...Ch. 19 - Prob. 58ECh. 19 - Prob. 59ECh. 19 - Which metal is the best reducing agent? Mn Al Ni...Ch. 19 - Use tabulated electrode potentials to calculate...Ch. 19 - Use tabulated electrode potentials to calculate...Ch. 19 - Prob. 63ECh. 19 - Calculate the equilibrium constant for each of the...Ch. 19 - Calculate the equilibrium constant for the...Ch. 19 - Prob. 66ECh. 19 - Calculate Grxn and Ecell for a redox reaction with...Ch. 19 - Prob. 68ECh. 19 - Prob. 69ECh. 19 - Prob. 70ECh. 19 - Prob. 71ECh. 19 - Prob. 72ECh. 19 - Prob. 73ECh. 19 - Prob. 74ECh. 19 - Prob. 75ECh. 19 - Consider the concentration cell: Label the anode...Ch. 19 - Prob. 77ECh. 19 - Prob. 78ECh. 19 - Prob. 79ECh. 19 - Prob. 80ECh. 19 - Refer to the tabulated values of Gf in Appendix...Ch. 19 - Refer to the tabulated values of Gf in Appendix...Ch. 19 - Prob. 83ECh. 19 - Prob. 84ECh. 19 - Prob. 85ECh. 19 - Prob. 86ECh. 19 - Prob. 87ECh. 19 - Which products are obtained in the electrolysis of...Ch. 19 - Write equations for the half-reactions that occur...Ch. 19 - Which products are obtained in the electrolysis of...Ch. 19 - Prob. 91ECh. 19 - Write equations for the half-reactions that occur...Ch. 19 - Prob. 93ECh. 19 - Prob. 94ECh. 19 - Prob. 95ECh. 19 - Silver can be electroplated at the cathode of an...Ch. 19 - A major source of sodium metal is the electrolysis...Ch. 19 - Prob. 98ECh. 19 - Prob. 99ECh. 19 - Prob. 100ECh. 19 - Consider the molecular view of an AL strip and...Ch. 19 - Consider the molecular view of an electrochemical...Ch. 19 - Prob. 103ECh. 19 - Prob. 104ECh. 19 - The cell potential of this electrochemical cell...Ch. 19 - Prob. 106ECh. 19 - Prob. 107ECh. 19 - Consider the reaction shown here occurring at...Ch. 19 - Prob. 109ECh. 19 - What voltage can theoretically be achieved in a...Ch. 19 - A battery relies on the oxidation of magnesium and...Ch. 19 - A rechargeable battery is constructed based on a...Ch. 19 - If a water electrolysis cell operates at a current...Ch. 19 - Prob. 114ECh. 19 - Prob. 115ECh. 19 - Prob. 116ECh. 19 - Calculate Grxn and K for each reaction. The...Ch. 19 - Calculate Grxn and K for each reaction. The...Ch. 19 - The molar mass of a metal (M) is 50.9 g/mol; it...Ch. 19 - A metal forms the fluoride MF3. Electrolysis of...Ch. 19 - A sample of impure tin of mass 0.535 g is...Ch. 19 - Prob. 122ECh. 19 - Prob. 123ECh. 19 - A 215 mL sample of a 0.500 M NaCl solution with an...Ch. 19 - Prob. 125ECh. 19 - Prob. 126ECh. 19 - Prob. 127ECh. 19 - Prob. 128ECh. 19 - Prob. 129ECh. 19 - Prob. 130ECh. 19 - Prob. 131ECh. 19 - Three electrolytic cells are connected in a...Ch. 19 - Prob. 133ECh. 19 - Prob. 134ECh. 19 - Prob. 135ECh. 19 - Prob. 136ECh. 19 - Prob. 137ECh. 19 - Prob. 138ECh. 19 - Prob. 139ECh. 19 - Prob. 140ECh. 19 - Design a device that uses as electrochemical cell...Ch. 19 - Using a library or the Internet, research a fuel...Ch. 19 - Prob. 143ECh. 19 - Balance the redox reaction equation (occurring in...Ch. 19 - Prob. 2SAQCh. 19 - Prob. 3SAQCh. 19 - Refer to Table 19.1 to determine which statement...Ch. 19 - Prob. 5SAQCh. 19 - The Zn/Zn2+ electrode has a standard electrode...Ch. 19 - Refer to Table 19.1 to calculate G for the...Ch. 19 - A redox reaction has an Ecell=0.56V . What can you...Ch. 19 - Prob. 9SAQCh. 19 - Prob. 10SAQCh. 19 - Prob. 11SAQCh. 19 - Prob. 12SAQCh. 19 - Which reaction occurs at the cathode of an...Ch. 19 - Copper is plated onto the cathode of an...Ch. 19 - Prob. 15SAQ
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