ORGANIC CHEMISTRY-PACKAGE >CUSTOM<
10th Edition
ISBN: 9781260028355
Author: Carey
Publisher: MCG CUSTOM
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Chapter 1, Problem 72DSP
Interpretation Introduction
Interpretation:
The Lewis formula that is a constitutional isomer of formamide is to be determined.
Concept introduction:
Compounds having the same molecular formula are called isomers.
Constitutional isomers are the compounds having same molecular formula but they differ in the connectivity of atoms present in the compounds.
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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 1 Solutions
ORGANIC CHEMISTRY-PACKAGE >CUSTOM<
Ch. 1.1 - How many electrons does carbon have? How many are...Ch. 1.1 - Referring to the periodic table as needed, write...Ch. 1.2 - Species that have the same number of electrons are...Ch. 1.2 - Which of the following ions possess a noble gas...Ch. 1.2 - Prob. 5PCh. 1.3 - Prob. 6PCh. 1.3 - Problem 1.7 All of the hydrogens are bonded to...Ch. 1.4 - Problem 1.8 In which of the compounds...Ch. 1.4 - Indicate the direction of the dipole for the...Ch. 1.5 - Prob. 10P
Ch. 1.5 - The following inorganic species will be...Ch. 1.5 - Prob. 12PCh. 1.6 - Prob. 13PCh. 1.6 - Problem 1.14 Nitrosomethane and formaldoxime both...Ch. 1.6 - Prob. 15PCh. 1.7 - All of the bonds in the carbonate ion (CO32-) are...Ch. 1.7 - Prob. 17PCh. 1.8 - Prob. 18PCh. 1.8 - Prob. 19PCh. 1.9 - Sodium borohydride, NaBH4, has an ionic bond...Ch. 1.9 - Prob. 21PCh. 1.10 - Which of the following compounds would you expect...Ch. 1.11 - Using the curved arrow to guide your reasoning,...Ch. 1.11 - Prob. 24PCh. 1.11 - Prob. 25PCh. 1.12 - Prob. 26PCh. 1.12 - Prob. 27PCh. 1.12 - Prob. 28PCh. 1.12 - Prob. 29PCh. 1.12 - Prob. 30PCh. 1.13 - Which is the stronger acid, H2O or H2S? Which is...Ch. 1.13 - Prob. 32PCh. 1.13 - Prob. 33PCh. 1.13 - Hypochlorous and hypobromous acid (HOClandHOBr)...Ch. 1.13 - Prob. 35PCh. 1.13 - Prob. 36PCh. 1.14 - What is the equilibrium constant for the following...Ch. 1.14 - Prob. 38PCh. 1.14 - Prob. 39PCh. 1.15 - Write an equation for the Lewis acid/Lewis base...Ch. 1 - Write a Lewis formula for each of the following...Ch. 1 - Prob. 42PCh. 1 - Write structural formulas for all the...Ch. 1 - Prob. 44PCh. 1 - Expand the following structural representations so...Ch. 1 - Each of the following species will be encountered...Ch. 1 - Consider Lewis formulas A, B, and C: H2 C -NN:...Ch. 1 - Prob. 48PCh. 1 - Prob. 49PCh. 1 - Prob. 50PCh. 1 - Prob. 51PCh. 1 - Prob. 52PCh. 1 - Prob. 53PCh. 1 - Prob. 54PCh. 1 - Which compound in each of the following pairs...Ch. 1 - With a pKa of 11.6, hydrogen peroxide is a...Ch. 1 - The structure of montelukast, an antiasthma drug,...Ch. 1 - One acid has a pKa of 2, the other has a pKa of 8....Ch. 1 - Calculate Ka for each of the following acids,...Ch. 1 - Rank the following in order of decreasing acidity....Ch. 1 - Rank the following in order of decreasing...Ch. 1 - Consider 1.0 M aqueous solutions of each of the...Ch. 1 - Prob. 63PCh. 1 - Prob. 64PCh. 1 - Prob. 65PCh. 1 - Prob. 66PCh. 1 - Prob. 67PCh. 1 - Prob. 68PCh. 1 - Amide Lewis Structural Formulas Lewis formulas are...Ch. 1 - Amide Lewis Structural Formulas Lewis formulas are...Ch. 1 - Amide Lewis Structural Formulas Lewis formulas are...Ch. 1 - Prob. 72DSPCh. 1 - Amide Lewis Structural Formulas Lewis formulas are...Ch. 1 - Amide Lewis Structural Formulas Lewis formulas are...
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