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Chemistry
i need to show me steps of the mechanism of extraction and drying of ethyl acetate with caffeine and water.
Step by step
Solved in 3 steps
- Given a mixture of benzoic acid, 2-naphthol and p-dimethoxybenzene in t-butyl methyl ether. Using the following reagents: NaHCOs, NAOH and HCI. Draw a flow chart showing: a) How to separate the three components of this mixture? b) Identify the aqueous and organic layers in each step. c) Identify the number of extraction step.10) 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?Provide or make a schematic diagram showing the EXTRACTION PROCESSES OF CAFFEINE. please follow instructions. Please note: extraction processes of caffeine only not extraction processes of caffeine from an instant Coffee
- Why does a solid form at the interface of the two solutions? PROCEDURESynthesis of NylonIn a small beaker dissolve ~ 0.5 mL of sebacoyl chloride in 12 mL of ether. In a smalltest tube get ~ 6 mL (~1/4 of a 6 “ test tube) of 1,6-diaminohexane solution in water.In order to form the good polymer fibers, it is best to not mix the solutions. Youshould try to layer one solution on top of the other. First pour the 1,6-diaminohexanesolution into a 100 mL beaker. Then slowly pour the sebacoyl chloride down the sideof the tilted beaker with minimal mixing. At this point you should see two distinctlayers with a white film at the interface. Hook the nylon which forms at the interfacewith a straightened paper clip and pull slowly straight up as high as possible. Thenwrap it around your large beaker and then continue to wind the polymer around tillthe reaction is complete. Rinse your polymer in DI water to remove any salts or acidthat may be present.Weigh your product and characterize it by…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.You 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.
- You 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.Suppose you have an organic sample X that is somewhat soluble in water, even though it issomewhat more soluble in dichloromethane or ether solvents. But if you do a singleextraction, you get only 60% of your material to transfer from the water to the organic layer.How many “washes” would it take to extract over 90% of your organic material extracted fromthe water layer?What method of separation would you use to isolate compound B from an ether solution containing a mixture of the two compounds below? OH A B Extract with base, isolate the aqueous layer, neutralize with acid, filter the precipitate and dry Extract with acid, isolate the aqueous layer, neutralize with base, filter the precipitate and dry Extract with base, isolate the organic layer, dry with magnesium sulfate, and evaporate the solvent Extract with acid, isolate the organic layer, dry with magnesium sulfate, and evaporate the solvent Extract with base, isolate the organic layer, neutralize with acid, filter the precipitate and dry Extract with acid, isolate the organic layer, neutralize with base, filter the precipitate and dry
- Underline the organic solvent(s) given that would work for the extraction:dichloromethane-water, acetone-water, benzene-water.Concisely explain why the solvent(s) not underlined do(es) not work.Answer the questions below. a) 500 ml. Acetic acid in 200 mL acetic acid-water mixture containing 30% acetic acid by volume with pure isopropyl ether will be separated by LIQUID-LIQUID extraction. Assuming the dispersion coefficient of acetic acid in isopropyl ether+water carjumine is 2, calculate the amount of acetic acid that passes into the organic phase and the extraction yield. b) What are the desired properties of the solvents used in liquid-liquid extraction processes?Three sample, X (neutral), Y (basic), and Z (acidic), were mixed and dissolved together in dichloromethane. Propose a method to separate all given sample individually using the combination of liquid-liquid extraction, crystallization, distillation, and sublimation technique.