Chemistry: The Central Science (13th Edition)
13th Edition
ISBN: 9780321910417
Author: Theodore E. Brown, H. Eugene LeMay, Bruce E. Bursten, Catherine Murphy, Patrick Woodward, Matthew E. Stoltzfus
Publisher: PEARSON
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Textbook Question
Chapter 10.7, Problem 10.12.1PE
Is the separation method used in brewing a cup of coffee best described as distillation, filtration, or chromatography? [Section 1.31Q]
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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 10 Solutions
Chemistry: The Central Science (13th Edition)
Ch. 10.2 - Classify each of the following as a pure substance...Ch. 10.2 - Classify each of the following as a pure substance...Ch. 10.2 - 1.15 Give the chemical symbol or name for the...Ch. 10.2 - 1.16 Give the chemical symbol or name for each of...Ch. 10.3 - A solid white substance A is heated strongly in...Ch. 10.3 - 1.18 You are hiking in the mountains and find a...Ch. 10.4 - 1.19 In the process of attempting to characterize...Ch. 10.4 - 1.20
Read the following description of the element...Ch. 10.4 - Prob. 10.5.1PECh. 10.4 - A match is lit and held under a cold piece of...
Ch. 10.4 - Which separation method is better suited for...Ch. 10.4 - Two beakers contain clear, colorless liquids. When...Ch. 10.5 - Prob. 10.7.1PECh. 10.5 - Prob. 10.7.2PECh. 10.5 - Prob. 10.8.1PECh. 10.5 - Prob. 10.8.2PECh. 10.5 - Prob. 10.9.1PECh. 10.5 - Prob. 10.9.2PECh. 10.6 - Prob. 10.10.1PECh. 10.6 - Prob. 10.10.2PECh. 10.6 - Musical instruments like trumpets and trombones...Ch. 10.6 - Consider the two spheres shown here, one made of...Ch. 10.7 - Is the separation method used in brewing a cup of...Ch. 10.7 - Identify each of the following as measurements of...Ch. 10.8 - Three spheres of equal size are composed of...Ch. 10.8 - The three targets from a rifle range shown below...Ch. 10.8 - What is the length of the pencil in the following...Ch. 10.8 - How many significant figures should be reported...Ch. 10.9 - Consider the jar of jelly beans in the photo. To...Ch. 10.9 - The photo below shows a picture of an agate stone....Ch. 10 - SO Two students deterrmne the percen.ge of lead in...Ch. 10 - 1.70
Is Om use of significant figures in ea. of...Ch. 10 - Water has a density of 0.997 g/cm3 at 25C ; ice...Ch. 10 - Prob. 3ECh. 10 - Practice Exercise 1 A biochemist who is studying...Ch. 10 - Practice Exercise 2
Write the empirical formula...Ch. 10 - Prob. 6ECh. 10 - Hydrogen sulfide is composed of two elements:...Ch. 10 - Consider an atom of "B. a. How many protons,...Ch. 10 - 2.34
a. What is the mass in amu of a carbon-12...Ch. 10 - Prob. 10ECh. 10 - You have a graduated cylinder that contains a...Ch. 10 - The density of air at ordinary atmospheric...Ch. 10 - Prob. 13ECh. 10 - Prob. 14ECh. 10 - Prob. 15ECh. 10 - 165 Classify ea. al the folbwing as a pure...Ch. 10 - Prob. 17ECh. 10 - Prob. 18ECh. 10 - Prob. 19ECh. 10 - What type of quantity (for example, length,...Ch. 10 - 1.72 Give the derived SI units for each of the...Ch. 10 - 1.73 The distance from Earth to the Moon is...Ch. 10 - 1.74 Which of the following would you characterize...Ch. 10 -
1.75 The U.S. quarter has a mass of 5.67 g and is...Ch. 10 -
1.76 In the United States, water used for...Ch. 10 -
1.77 By using estimation techniques, determine...Ch. 10 - Suppose you decide to define your own temperature...Ch. 10 -
1.79 The liquid substances mercury (density =...Ch. 10 -
1.80 Two spheres of equal volume are placed on...Ch. 10 - A 32.65-g sample of a solid is placed in a flask....Ch. 10 - A thief plans to steal a gold sphere with a radius...Ch. 10 - Automobile batteries contain sulfuric acid, which...Ch. 10 - A 40-lb container of peat moss measures 14 x 20 x...Ch. 10 - A package of aluminum foil contains 50 ft2of foil,...Ch. 10 - Prob. 35ECh. 10 -
1.88 In 2005, J. Robin Warren and Barry J....Ch. 10 -
1 89 A 25 0-cm.long cylindrical glass tube,...Ch. 10 -
1.90 Gold is alloyed (mixed) with other metals to...Ch. 10 -
1.91 Paper chromatography is a simple but...Ch. 10 -
1.93 You are assigned the task of separating a...Ch. 10 - Prob. 41ECh. 10 - Which of the following factors determines the size...Ch. 10 - Practice Exercise 2 The diameter of a cartoon atom...Ch. 10 - Practice Exercise 1 Which of these atoms has the...Ch. 10 - Practice Exercise 2
How many protons, neutrons,...Ch. 10 - Prob. 46ECh. 10 - Which is mode at 1.00 atm and 298K: CO2,,N2O,or...Ch. 10 - Practice Exercise 1 There are two stable isotopes...Ch. 10 - Practice Exercise 2
Three isotopes of silicon...Ch. 10 - Practice Exercise 2 Locate Na (sodium) and Br...Ch. 10 - Practice Exercise 1 Tetra carbon dioxide is an...Ch. 10 - Practice Exercise 2 Give the empirical formula for...Ch. 10 - Practice Exercise 1 In which of the following...Ch. 10 - Practice Exercise 2 How many protons, neutrons,...Ch. 10 - Practice Exercise 1
Although it is helpful to...Ch. 10 - Prob. 56ECh. 10 - Prob. 57ECh. 10 - Prob. 58ECh. 10 - Prob. 59ECh. 10 - Practice Exercise 1 Which of the follow-mg ox...Ch. 10 - Prob. 61ECh. 10 - Prob. 62ECh. 10 - Prob. 63ECh. 10 - Prob. 64ECh. 10 - Prob. 65ECh. 10 - Prob. 66ECh. 10 - Practice Exercise 2
Give the chemical fomi uias...Ch. 10 - Prob. 68ECh. 10 - Prob. 69ECh. 10 - The followmg diagram is a representation of 20...Ch. 10 - 2 3 Four of the boxes in the following periodic...Ch. 10 -
24 Does the following drawing represent a neutral...Ch. 10 - 2.5 Which of the following diagrams most likely...Ch. 10 - Write the chemical formula for the following...Ch. 10 - Prob. 75ECh. 10 - Prob. 76ECh. 10 - Prob. 77ECh. 10 - Prob. 78ECh. 10 - Prob. 79ECh. 10 - Prob. 80ECh. 10 - Prob. 81ECh. 10 - Prob. 82ECh. 10 - Prob. 83ECh. 10 - Prob. 84ECh. 10 - Explain the difference between effusion and...Ch. 10 - Prob. 86ECh. 10 - Prob. 87ECh. 10 - Prob. 88ECh. 10 - Prob. 89ECh. 10 - Prob. 90ECh. 10 - Prob. 91ECh. 10 - Prob. 92ECh. 10 - Prob. 93ECh. 10 - Prob. 94ECh. 10 - In Sample Exercise 10.16, we found that one mole...Ch. 10 - Prob. 96ECh. 10 - Prob. 97ECh. 10 - Prob. 98ECh. 10 - Prob. 99AECh. 10 - Prob. 100AECh. 10 - Prob. 101AECh. 10 - Prob. 102AECh. 10 - Prob. 103AECh. 10 - Prob. 104AECh. 10 - Prob. 105AECh. 10 - Prob. 106AECh. 10 - Prob. 107AECh. 10 - Prob. 108AECh. 10 - Prob. 109AECh. 10 - Prob. 110AECh. 10 - Prob. 111AECh. 10 - Prob. 112AECh. 10 - Prob. 113AECh. 10 - Prob. 114AECh. 10 - Prob. 115AECh. 10 - Prob. 116AECh. 10 - Prob. 117AECh. 10 - Prob. 118AECh. 10 - Prob. 119IECh. 10 - Prob. 120IECh. 10 - Prob. 121IECh. 10 - Prob. 122IECh. 10 - Prob. 123IECh. 10 - Prob. 124IECh. 10 - Chlorine dioxide gas (ClO2) is used as a...Ch. 10 - Natural gas is very abundant us many Middle...Ch. 10 -
[10.127] Gaseous iodine pentafluoride. IF3 can be...Ch. 10 - [10.128]A 6.53-g sample of mixture of magnesium...
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