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Owlv2 With Labskills, 4 Terms (24 Months) Printed Access Card For Williamson/masters' Macroscale And Microscale Organic Experiments, 7th
7th Edition
ISBN: 9781305884168
Author: Williamson, Kenneth L.; Masters, Katherine M.
Publisher: Cengage Learning
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Textbook Question
Chapter 7, Problem 6Q
To isolate benzoic acid from a bicarbonate solution, it is acidified with concentrated hydrochloric acid, as in experiment 1. What volume of acid is needed to neutralize the bicarbonate? The concentration of hydrochloric acid is expressed in various ways on the inside back cover of this laboratory manual.
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Why are alcoholic solutions used in the hydroxamic acid test for esters?
REAGENT AMOUNTS In this section, you must record the actual amounts and volumes of reagens use
in the lab.
090
ml
Volume of methyl benzoate:
mmol
Equivalent to a molar amount of:
30 1.0
ml
Volume of concentrated Nitric acid (16 M = 16 mol/L):
Equivalent to a molar amount of :
mmol
Volume of concentrated Sulfurie acid acid (18 M = 18 mol/L):
3.0
ml
Equivalent to a molar amount of:
mmol
0.90 mL IL
=0.0009 L
lo0omL
Cinnamon is made up of a mixture of many compounds. Cinnamaldehyde is the component responsible for cinnamon flavor. Several of these compounds are also a potent antimicrobial compounds present in essential oils. The following results were obtained for known concentrations of three of the compounds.
Concentration (mg sample/200 uL)
Cinnamaldehyde
Eugenol
Thymol
0.50
0.4
0.65
1.8
0.75
1.0
0.8
1.10
1.2
1.25
2.0
1.30
3.0
1.50
1.5
1.90
3.1
2.0
4.6
2.50
4.0
5.8
Determine the calibration curve equations for each component including regression.
which component has the highest calibration sensitivity?
A sample containing the three essential oils in part b gave the peak areas relative to the internal standard of cinnamaldehyde 2.6, eugenol 0.9 and thymol 3.8. Determine the concentration of each of the oils in the sample and the standard deviations.
Chapter 7 Solutions
Owlv2 With Labskills, 4 Terms (24 Months) Printed Access Card For Williamson/masters' Macroscale And Microscale Organic Experiments, 7th
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Solutions: Crash Course Chemistry #27; Author: Crash Course;https://www.youtube.com/watch?v=9h2f1Bjr0p4;License: Standard YouTube License, CC-BY