Concept explainers
(a)
Interpretation:-The reason for washing the organic layer with a solution of sodium carbonate, in the work-up procedure, needs to be given.
Concept Introduction: The process of isolating and purifying products, formed during a
(b)
Interpretation:- In the work-up procedure, the organic layer was washed with a solution of sodium carbonate, and the reaction that occurs during this wash along with the gas that gets evolved needs to be written.
Concept Introduction:- An alkali when reacts with an acid, water is one of the products formed.
(c)
Interpretation: The organic layer is being washed with a solution of sodium carbonate, in a work-up procedure, and the reason regarding its importance to vent a separatory funnel for performing this wash, needs to be given.
Concept Introduction: A laboratory glassware apparatus that is used to separate liquids, from a mixture of the same into heterogeneous solvent phases with varying densities, is called a separatory funnel.
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Chapter 9 Solutions
EBK EXPERIMENTAL ORGANIC CHEMISTRY: A M
- Draw a flow chart show how you would extract the following three compounds by extraction. H₂C-CH3 H₂N ढे OHarrow_forwarda. Sodium hydroxide and ethanol are added to 2-naphthol and then refluxed for thirty minutes before the addition of 1-bromobutane. Why is it important to allow this mixture to reflux before the addition of 1-bromobutane? b. Will sodium hydroxide or ethanol react most with 2-naphthol? Explain why one substance will react more with 2-naphthol than the other.arrow_forward10. Chapter 16: Organic synthesis- The Last Two Steps in a Multi-step Synthesis of Methyl m-nitrobenzoate CH,OH a. What was the purpose of refluxing in this lab? b. What was the purpose of boiling chips? © Why was t-butyl methyl ether the used? d. What layer was the sulfuric acid and methanol in? To pevent bumping Why was saturated aqueous sodium bicarbonate added? L Why was saturated sodium chloride added? g Why was anhydrous calcium chloride added? h. Purpose of simple distillation? To prevent renatant solven loss ta a heated ckemical eachion MacBook Airarrow_forward
- why is it necessary to cool the acidic exact of aniline in ice before adding solid sodium hydroxide?arrow_forwardWhich of these could result to a higher product yield? a. Addition of 0.1M H2SO4 instead of concentrated H2SO4. b. Na2SO4 was not added in the obtained organic layer. c. Pure alcohols and carboxylic acids were used in the synthesis d. The refluxed solution was not purified.arrow_forward2. Please explain what is A and B in the separating funnel when using NaOH to extract Dichloromethane solution and why? A Barrow_forward
- Why is it not required to take the melting point of the benzaldehyde starting material? a. The benzoin melting point is double the range of the benzaldehyde so just divide the product's melting point by 2. b. Benzaldehyde doesn't melt smoothly, it only turns into charcoal. c. Benzaldehyde isn't pure and we never take a melting point of an unpure solid. d. Benzaldehyde is a liquid. e. Benzaldehyde is a toxic substance.arrow_forwardRegarding an organic chemistry laboratory experiment: a. In this experiment, the distillate is initially extracted with diethyl ether (Et2O). Provide two important safety issues regarding the use of diethyl ether. b. Eugenol is a phenol (i.e., an aromatic alcohol). Why is diethyl ether used to extract it from the distillate rather than ethanol?arrow_forward4)need helparrow_forward
- A certain compound is known to contain an aromatic benzene ring but failed to produce a fragrant yellow solution upon subjecting it to the nitration test. What may be a possible explanation for this? A. The benzene ring is part of a highly conjugated, blue dye molecule. B. The benzene ring contains a strong electron-withdrawing group. C. The benzene ring has no available sites left for electrophilic attack. D. All of the given. Kindly explain your answer in detail.arrow_forward1. Predict the position (top and bottom layer) of the organic and aqueous layers in the following extractions: a. Cyclohexane and saturated sodium chloride solution b. Chloroform and 5% sodium hydroxide solution. c. Methyl tert-butyl ether and waterarrow_forwarda. Give at least three characteristics of dichloromethane that makes it a good extracting solvent for the alkaloid.b. Why is it necessary to remove a stopper from a separatory funnel when the liquid is being drained from it through a stopcock?c. What are emulsions? Why do they form during extractions? How is the formation of an emulsion minimized? How are emulsions removed?arrow_forward
- EBK A SMALL SCALE APPROACH TO ORGANIC LChemistryISBN:9781305446021Author:LampmanPublisher:CENGAGE LEARNING - CONSIGNMENT