EBK ORGANIC AND BIOLOGICAL CHEMISTRY
7th Edition
ISBN: 9780100547742
Author: STOKER
Publisher: YUZU
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 2.7, Problem 1QQ
Interpretation Introduction
Interpretation:
The correct option regarding pheromone has to be chosen from the given options.
Concept Introduction:
Pheromone is a chemical substance that is excreted or secreted by insects. This triggers a response in other members of same species. Some of the types of pheromones are alarm pheromones, aggregation pheromone, territorial pheromone and sex pheromone.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
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 2 Solutions
EBK ORGANIC AND BIOLOGICAL CHEMISTRY
Ch. 2.1 - Prob. 1QQCh. 2.1 - Prob. 2QQCh. 2.1 - Prob. 3QQCh. 2.2 - Prob. 1QQCh. 2.2 - Prob. 2QQCh. 2.2 - Prob. 3QQCh. 2.2 - Prob. 4QQCh. 2.3 - Prob. 1QQCh. 2.3 - Prob. 2QQCh. 2.3 - Prob. 3QQ
Ch. 2.3 - Prob. 4QQCh. 2.4 - Prob. 1QQCh. 2.4 - Prob. 2QQCh. 2.5 - Prob. 1QQCh. 2.5 - Prob. 2QQCh. 2.5 - Prob. 3QQCh. 2.6 - Prob. 1QQCh. 2.6 - Prob. 2QQCh. 2.6 - Prob. 3QQCh. 2.7 - Prob. 1QQCh. 2.7 - Prob. 2QQCh. 2.7 - Prob. 3QQCh. 2.8 - Prob. 1QQCh. 2.8 - Prob. 2QQCh. 2.9 - Prob. 1QQCh. 2.9 - Prob. 2QQCh. 2.10 - Prob. 1QQCh. 2.10 - Prob. 2QQCh. 2.10 - Prob. 3QQCh. 2.10 - Prob. 4QQCh. 2.10 - Prob. 5QQCh. 2.11 - Prob. 1QQCh. 2.11 - Prob. 2QQCh. 2.11 - Prob. 3QQCh. 2.11 - Prob. 4QQCh. 2.11 - Prob. 5QQCh. 2.12 - Prob. 1QQCh. 2.12 - Prob. 2QQCh. 2.12 - Prob. 3QQCh. 2.12 - Prob. 4QQCh. 2.12 - Prob. 5QQCh. 2.13 - Prob. 1QQCh. 2.13 - Prob. 2QQCh. 2.13 - Prob. 3QQCh. 2.14 - Prob. 1QQCh. 2.14 - Prob. 2QQCh. 2.14 - Prob. 3QQCh. 2.14 - Prob. 4QQCh. 2.15 - Prob. 1QQCh. 2.15 - Prob. 2QQCh. 2.15 - Prob. 3QQCh. 2.15 - Prob. 4QQCh. 2.16 - Prob. 1QQCh. 2.16 - Prob. 2QQCh. 2 - Classify each of the following hydrocarbons as...Ch. 2 - Prob. 2.2EPCh. 2 - Prob. 2.3EPCh. 2 - Prob. 2.4EPCh. 2 - Prob. 2.5EPCh. 2 - Prob. 2.6EPCh. 2 - Prob. 2.7EPCh. 2 - Characterize the physical properties of saturated...Ch. 2 - Prob. 2.9EPCh. 2 - Prob. 2.10EPCh. 2 - Prob. 2.11EPCh. 2 - Prob. 2.12EPCh. 2 - Prob. 2.13EPCh. 2 - Prob. 2.14EPCh. 2 - What is the name of the spatial arrangement for...Ch. 2 - Prob. 2.16EPCh. 2 - Prob. 2.17EPCh. 2 - Prob. 2.18EPCh. 2 - Draw a condensed structural formula for each of...Ch. 2 - Prob. 2.20EPCh. 2 - The following names are incorrect by IUPAC rules....Ch. 2 - The following names are incorrect by IUPAC rules....Ch. 2 - Prob. 2.23EPCh. 2 - Draw a condensed structural formula for each of...Ch. 2 - Prob. 2.25EPCh. 2 - Classify each of the following compounds as...Ch. 2 - Prob. 2.27EPCh. 2 - How many hydrogen atoms are present in a molecule...Ch. 2 - Draw a line-angle structural formula for each of...Ch. 2 - Draw a line-angle structural formula for each of...Ch. 2 - Prob. 2.31EPCh. 2 - Prob. 2.32EPCh. 2 - Prob. 2.33EPCh. 2 - Prob. 2.34EPCh. 2 - Prob. 2.35EPCh. 2 - Prob. 2.36EPCh. 2 - Prob. 2.37EPCh. 2 - Prob. 2.38EPCh. 2 - For each of the following pairs of alkenes,...Ch. 2 - For each of the following pairs of alkenes,...Ch. 2 - Prob. 2.41EPCh. 2 - Prob. 2.42EPCh. 2 - Prob. 2.43EPCh. 2 - Prob. 2.44EPCh. 2 - Prob. 2.45EPCh. 2 - Prob. 2.46EPCh. 2 - For each molecule, indicate whether cistrans...Ch. 2 - Prob. 2.48EPCh. 2 - Prob. 2.49EPCh. 2 - Prob. 2.50EPCh. 2 - Draw a structural formula for each of the...Ch. 2 - Prob. 2.52EPCh. 2 - Prob. 2.53EPCh. 2 - For each of the following molecules, indicate...Ch. 2 - Prob. 2.55EPCh. 2 - Prob. 2.56EPCh. 2 - Prob. 2.57EPCh. 2 - Prob. 2.58EPCh. 2 - Prob. 2.59EPCh. 2 - How many isoprene units are present in a....Ch. 2 - Prob. 2.61EPCh. 2 - Indicate whether each of the following statements...Ch. 2 - Prob. 2.63EPCh. 2 - Prob. 2.64EPCh. 2 - Prob. 2.65EPCh. 2 - Prob. 2.66EPCh. 2 - Prob. 2.67EPCh. 2 - Prob. 2.68EPCh. 2 - Prob. 2.69EPCh. 2 - Prob. 2.70EPCh. 2 - Prob. 2.71EPCh. 2 - Prob. 2.72EPCh. 2 - Prob. 2.73EPCh. 2 - Prob. 2.74EPCh. 2 - Prob. 2.75EPCh. 2 - Prob. 2.76EPCh. 2 - Supply the structural formula of the product in...Ch. 2 - Prob. 2.78EPCh. 2 - Prob. 2.79EPCh. 2 - What reactant would you use to prepare each of the...Ch. 2 - Prob. 2.81EPCh. 2 - Prob. 2.82EPCh. 2 - Prob. 2.83EPCh. 2 - Prob. 2.84EPCh. 2 - Prob. 2.85EPCh. 2 - Prob. 2.86EPCh. 2 - Prob. 2.87EPCh. 2 - Prob. 2.88EPCh. 2 - Prob. 2.89EPCh. 2 - Prob. 2.90EPCh. 2 - Prob. 2.91EPCh. 2 - Prob. 2.92EPCh. 2 - Prob. 2.93EPCh. 2 - Prob. 2.94EPCh. 2 - Prob. 2.95EPCh. 2 - Prob. 2.96EPCh. 2 - Prob. 2.97EPCh. 2 - Prob. 2.98EPCh. 2 - Prob. 2.99EPCh. 2 - Prob. 2.100EPCh. 2 - Prob. 2.101EPCh. 2 - Prob. 2.102EPCh. 2 - Prob. 2.103EPCh. 2 - Prob. 2.104EPCh. 2 - Prob. 2.105EPCh. 2 - Prob. 2.106EPCh. 2 - Prob. 2.107EPCh. 2 - Prob. 2.108EPCh. 2 - Assign each of the compounds in Problem 13-107 an...Ch. 2 - Assign each of the compounds in Problem 13-108 an...Ch. 2 - Prob. 2.111EPCh. 2 - Prob. 2.112EPCh. 2 - Prob. 2.113EPCh. 2 - Prob. 2.114EPCh. 2 - Prob. 2.115EPCh. 2 - Prob. 2.116EPCh. 2 - Prob. 2.117EPCh. 2 - Prob. 2.118EPCh. 2 - Prob. 2.119EPCh. 2 - Prob. 2.120EPCh. 2 - Prob. 2.121EPCh. 2 - Prob. 2.122EPCh. 2 - Prob. 2.123EPCh. 2 - Prob. 2.124EPCh. 2 - Prob. 2.125EPCh. 2 - Prob. 2.126EPCh. 2 - Prob. 2.127EPCh. 2 - Prob. 2.128EPCh. 2 - Prob. 2.129EPCh. 2 - Prob. 2.130EP
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.Similar questions
- elow are experimentally determined van Deemter plots of column efficiency, H, vs. flow rate. H is a quantitative measurement of band broadening. The left plot is for a liquid chromatography application and the night is for gas chromatography. Compare and contrast these two plots in terms of the three band broadening mechanisms presented in this activity. How are they similar? How do they differ? Justify your answers.? 0.4 H (mm) 0.2 0.1- 0.3- 0 0.5 H (mm) 8.0 7.0 6.0 5.0 4.0- 3.0 T +++ 1.0 1.5 0 2.0 4.0 Flow Rate, u (cm/s) 6.0 8.0 Flow Rate, u (cm/s)arrow_forwardPredict the products of this organic reaction: + H ZH NaBH3CN H+ n. ? Click and drag to start drawing a structure. Xarrow_forwardWhat is the missing reactant R in this organic reaction? + R H3O+ + • Draw the structure of R in the drawing area below. • Be sure to use wedge and dash bonds if it's necessary to draw one particular enantiomer. Click and drag to start drawing a structure.arrow_forward
- What would be the best choices for the missing reagents 1 and 3 in this synthesis? 1 1. PPh3 2. n-BuLi 2 • Draw the missing reagents in the drawing area below. You can draw them in any arrangement you like. • Do not draw the missing reagent 2. If you draw 1 correctly, we'll know what it is. • Note: if one of your reagents needs to contain a halogen, use bromine. Click and drag to start drawing a structure.arrow_forwardThe product on the right-hand side of this reaction can be prepared from two organic reactants, under the conditions shown above and below the arrow. Draw 1 and 2 below, in any arrangement you like. 1+2 NaBH₂CN H+ N Click and drag to start drawing a structure. X $arrow_forwardExplain what is the maximum absorbance of in which caffeine absorbs?arrow_forward
- Explain reasons as to why the amount of caffeine extracted from both a singular extraction (5ml Mountain Dew) and a multiple extraction (2 x 5.0ml Mountain Dew) were severely high when compared to coca-cola?arrow_forwardProtecting Groups and Carbonyls 6) The synthesis generates allethrolone that exhibits high insect toxicity but low mammalian toxicity. They are used in pet shampoo, human lice shampoo, and industrial sprays for insects and mosquitos. Propose detailed mechanistic steps to generate the allethrolone label the different types of reagents (Grignard, acid/base protonation, acid/base deprotonation, reduction, oxidation, witting, aldol condensation, Robinson annulation, etc.) III + VI HS HS H+ CH,CH,Li III I II IV CI + P(Ph)3 V ༼ Hint: no strong base added VI S VII IX HO VIII -MgBr HgCl2,HgO HO. isomerization aqeuous solution H,SO, ༽༽༤༽༽ X MeOH Hint: enhances selectivity for reaction at the S X ☑arrow_forwardDraw the complete mechanism for the acid-catalyzed hydration of this alkene. esc 田 Explanation Check 1 888 Q A slock Add/Remove step Q F4 F5 F6 A བྲA F7 $ % 5 @ 4 2 3 & 6 87 Click and drag to start drawing a structure. © 2025 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Ce W E R T Y U S D LL G H IK DD 요 F8 F9 F10 F1 * ( 8 9 0 O P J K L Z X C V B N M H He commandarrow_forward
- Explanation Check F1 H₂O H₂ Pd 1) MCPBA 2) H3O+ 1) Hg(OAc)2, H₂O 2) NaBH4 OH CI OH OH OH hydration halohydrin formation addition halogenation hydrogenation inhalation hydrogenation hydration ☐ halohydrin formation addition halogenation formation chelation hydrogenation halohydrin formation substitution hydration halogenation addition Ohalohydrin formation subtraction halogenation addition hydrogenation hydration F2 80 F3 σ F4 F5 F6 1 ! 2 # 3 $ 4 % 05 Q W & Å © 2025 McGraw Hill LLC. All Rights Reserved. F7 F8 ( 6 7 8 9 LU E R T Y U A F9arrow_forwardShow the mechanism steps to obtain the lowerenergy intermediate: *see imagearrow_forwardSoap is made by the previous reaction *see image. The main difference between one soap and another soap isthe length (number of carbons) of the carboxylic acid. However, if a soap irritates your skin, they mostlikely used too much lye.Detergents have the same chemical structure as soaps except for the functional group. Detergentshave sulfate (R-SO4H) and phosphate (R-PO4H2) functional groups. Draw the above carboxylic acidcarbon chain but as the two variants of detergents. *see imagearrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Organic And Biological ChemistryChemistryISBN:9781305081079Author:STOKER, H. Stephen (howard Stephen)Publisher:Cengage Learning,
General, Organic, and Biological ChemistryChemistryISBN:9781285853918Author:H. Stephen StokerPublisher:Cengage Learning
Organic And Biological Chemistry
Chemistry
ISBN:9781305081079
Author:STOKER, H. Stephen (howard Stephen)
Publisher:Cengage Learning,
General, Organic, and Biological Chemistry
Chemistry
ISBN:9781285853918
Author:H. Stephen Stoker
Publisher:Cengage Learning