Laboratory Techniques in Organic Chemistry
4th Edition
ISBN: 9781464134227
Author: Jerry R. Mohrig, David Alberg, Gretchen Hofmeister, Paul F. Schatz, Christina Noring Hammond
Publisher: W. H. Freeman
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Chapter 3, Problem 2Q
Interpretation Introduction
Interpretation:
Melting point, molar mass boiling point and the density of the reagents and products that are involved in the synthesis of the aspirin should be determined.
Concept introduction:
Molar mass is the sum of
The boiling point is the temperature of substance when its vapor pressure is equal to the vapor pressure of surrounding and compound changes its state from liquid to vapor.
Melting point is the temperature of substance at that substance converts from solid to a liquid state.
The density of a substance is the ratio of its mass and volume. It is denoted by
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Given the chemical equation in the synthesis of benzoic acid from toluene and potassium permanganate:
C7H8(I) + 2KMnO4(aq) → KC7H5O2 + 2MnO2 (s) + KOH (aq) + H2O (I)
KC2H5O2 (aq) + HCl (aq) → C7H8O2 (s) + KCl (aq)
MW: C7H8 = 92.14
KMnO4 = 158.03
MnO2 = 86.94
KC7H5O2 = 160.21
C7H8O2 = 122
Density: C7H8 = 0.87 g/mL
KMnO4 = 2.7 g/mL
KC7H5O2 = 1.5 g/mL
C7H8O2 = 1.27 g/mL
If 1 mL of toluene and 4 mL of 50% w/v potassium permanganate solution are used to synthesize the benzoic acid in a reflux set-up, calculate the theoretical yield of benzoic acid. Show your complete solution and underline your final answer.
I am trying to calculate the theoretical & actual percent yield of amyl acetate from a Fischer reaction of 1-pentanol, H2SO4, and acetic anhydride. The final product obtained was 28.7g. Here is the information I know: 29mL of acetic anhydride was used, 5mL of H2SO4 was used as a catalyst, and (0.24mol) 26mL of 1-pentanol was used.
Propose you are given a mixture of naphthalene, propanoic acid, and diethyl amine. Explain, using a flow chart similar to that in #1, how you would separate these three compounds. Include all solvents and reagents, show the exact compound that is present at each juncture, and be clear about the experimental technique employed in each step.
Chapter 3 Solutions
Laboratory Techniques in Organic Chemistry
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