EBK EXPERIMENTAL ORGANIC CHEMISTRY: A M
6th Edition
ISBN: 9781305687875
Author: Gilbert
Publisher: CENGAGE LEARNING - CONSIGNMENT
expand_more
expand_more
format_list_bulleted
Question
Chapter 5.3, Problem 18E
Interpretation Introduction
Interpretation:
The reason for the sequence of extracting the diethyl ether solution of 2-naphthol (11), benzoic acid (5) and naphthalene (7) to start with aqueous bicarbonate followed by aqueous hydroxide and not the reverse order needs to be explained.
Concept Introduction :
Extraction is defined as a method used to isolate a substance which is mixed with some other substance. It is done by adding a solvent in which one the substance which needs to be extracted is soluble and other substance is insoluble.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
Account for the greater amount of internal pressure in the aspirin extraction versus the ß- naphthol extraction.Why does the sequence for extracting the diethyl ether solution of aspirin acid, naphthalene, and ß-naphthol start with aqueous bicarbonate and follow with aqueous hydroxide rather than the reverse order?
What is the function of the sulfuric acid in the dehydration of alcohols to form alkenes?
Why was it important to keep the Gas chromatograph close to room temperature during the analysis of the alkene mixture?
We want to extract terpenoids from an aqueous sample by continuous liquid-liquid extraction. Which of the following solvents is not suitable for this purpose? Why? Propanone (acetone), dichloromethane, heptane.
Chapter 5 Solutions
EBK EXPERIMENTAL ORGANIC CHEMISTRY: A M
Ch. 5.3 - Prob. 1ECh. 5.3 - Prob. 2ECh. 5.3 - Prob. 3ECh. 5.3 - Prob. 4ECh. 5.3 - Prob. 5ECh. 5.3 - Prob. 6ECh. 5.3 - Prob. 7ECh. 5.3 - Prob. 8ECh. 5.3 - Prob. 9ECh. 5.3 - Prob. 10E
Ch. 5.3 - Prob. 11ECh. 5.3 - Prob. 12ECh. 5.3 - Prob. 13ECh. 5.3 - Prob. 14ECh. 5.3 - Prob. 15ECh. 5.3 - Prob. 16ECh. 5.3 - Prob. 17ECh. 5.3 - Prob. 18ECh. 5.3 - Prob. 19ECh. 5.3 - Prob. 20ECh. 5.3 - Prob. 21ECh. 5.3 - Prob. 22ECh. 5.4 - Prob. 1ECh. 5.4 - Prob. 2ECh. 5.4 - Prob. 3ECh. 5.4 - Prob. 4ECh. 5.4 - Prob. 5ECh. 5.4 - Prob. 6ECh. 5.4 - Prob. 7ECh. 5.4 - Prob. 8ECh. 5.4 - Prob. 9ECh. 5.4 - Prob. 10ECh. 5.4 - Prob. 11ECh. 5.4 - Prob. 12E
Knowledge Booster
Similar questions
- Why are hexane, cyclohexane, and toluene soluble in ligroin?arrow_forwardA 1.5 L of organic compound solution contain 8.0 g of benzoic acid. Methyl tert-butyl ether (MTBE) solvent was used to extract the benzoic acid from the organic compounds into a diluted sodium bicarbonate solution via liquid-liquid extraction (LLE) method. The extracted benzoic acid was transformed into sodium benzoate aqueous solution after LLE. Calculate the total amount of the analyte extracted if the LLE process performed with 1:3 ratio for 3 times, with the recovery of 40% for every step. c)arrow_forwardConsider a ternary (three-component) system of amphiphile, hydrocarbon, and water. What structure do you expect to form if small amounts of the first two components are mixed with a large amount of water?arrow_forward
- Solvents: Water,Hexane, and Methanol Which solvent is best for the recrystallization of each of the following compounds: benzoic acid, acetanilide, naphthalene, resorcinol, andarrow_forward10) Write an equation for the reaction of n-propyl magnesium chloride and butanal (Not 3- methylbutanal). Why was it important to have dry equipment that was heated in oven and a drying tube placed on top of the condenser for the above-mentioned reaction? Explain?arrow_forwardgive at least three characteristics of dichloromethane that make it a good extracting solvent for alkaloidarrow_forward
- Give the advantages of using steam distillation in the recovery of an organic liquid from a mixture.arrow_forwardYou are employed as a coop student at the Drug and Alcohol Testing Association of Canada (DATAC) developing analytical tests for sports doping agents. You are asked to prepare a procedure for the extraction of methylphenidate, the active compound in Ritalin, from urine samples (consider them as simple aqueous layers, you do not need to consider other components!). The goal of the procedure is to extract the methylphenidate into an organic layer which will then be evaporated, and the residue will be tested for the drug.You find that methylphenidate is highly soluble in 2-methyltetrahydrofuran, a bio-renewable solvent. Draw the structure of 2-methyltetrahydrofuran and give two reasons why it is a good solvent choice for liquid-liquid extraction.arrow_forwardYou are employed as a coop student at the Drug and Alcohol Testing Association of Canada (DATAC) developing analytical tests for sports doping agents. You are asked to prepare a procedure for the extraction of methylphenidate, the active compound in Ritalin, from urine samples (consider them as simple aqueous layers, you do not need to consider other components!). The goal of the procedure is to extract the methylphenidate into an organic layer which will then be evaporated, and the residue will be tested for the drug.Your colleague is helping you develop the urine test. They suggest that the urine should be adjusted to a pH above 7 before extracting with the organic solvent. Why is this necessary? Support your explanation with a full arrow-pushing mechanism for the reaction that would occur if the pH was below 7. Include all formal charges, intermediates (if applicable) and products.arrow_forward
- Why is it bad to put too much water as the solvent when recrystillizing benzoic acid?arrow_forward3. The sequence for separating a solution of benzoic acid, naphthalene and 2-naphthol via extraction starts by washing the solution with aqueous sodium bicarbonate and follows with washing the resulting organic extract with aqueous sodium hydroxide. Why are the aqueous bases used in this order rather than the reverse order? Provide drawings and a brief explanation. The information below might be useful. OH Benzoic acid pka= 4.20 Base NaHCO3 NaOH OH 2-naphthol pka= 9.5 Conjugate Acid H₂CO3 H₂O naphthalene pka 6.4 16 1arrow_forwardHow do you construct a flow chart using extraction to separate a mixture of the 3 solids used below if dicholoromethane is the solvent and any other reagents can be used. The 3 solids are: pyrazole, p-chlorobenzoic acid, and benzophenone.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Macroscale and Microscale Organic ExperimentsChemistryISBN:9781305577190Author:Kenneth L. Williamson, Katherine M. MastersPublisher:Brooks Cole
Macroscale and Microscale Organic Experiments
Chemistry
ISBN:9781305577190
Author:Kenneth L. Williamson, Katherine M. Masters
Publisher:Brooks Cole