Chapter 3.2, Problem 33E

Please help me with this, I am trying to prepare for my final exam next week and I am just completely lost

Product Separation Scheme Draw a separation scheme to summarize how the pure product can be isolated; Begin by listing all the compounds that could be mixed in with your product, i.e. all reactants, solvents, and other products; in each separation step include the solvent(s)/reagent and separation technique, phases/states of matter for each separation.

Upon completing a synthesis, you attempt to purify your material via recrystallization. You dissolve the material in a minimal amount of hot solvent and then immediately place the vessel in an ice bath. You obtain the solid product through vacuum filtration. Any issues here? No issues, this is what you would do! You may have an impure solid due to rapid cooling of the vessel. You should have started with RT solvent to dissolve the material. You should use gravity filtration for the final isolation.

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what would the overall reaction be for the recrystillzation of aspirin using 91% isopropanol to get pure aspirin?(drawn out) what would the mechanism be(if any)?   More information provided below:   You are removing salt, talc and other impurities to get pure aspirin. Recrystallization is a useful technique that can be used to purify solid organic compounds. Thistechnique involves the solubility of organic solids in various solvents. For recrystallization towork properly, the target compound must dissolve in a solvent when it is hot and not dissolvewhen it is cold. In this experiment you will isolate pure aspirin from aspirin tablets. Aspirin tabletscontain various salts and impurities in addition to aspirin. By using recrystallization, you will beable to remove the impurities and be left with pure aspirin.Sometimes pairs of solvents can used to produce better results. In this experiment, 91%isopropanol will be used to recrystallize aspirin. The 91% isopropanol contains 91%…

You are attempting to purify a compound via recrystallization. You prepare the process through the following method: 1) Dissolve the material in a minimal amount of hot EtOH. 2) Slowly add hot water until the compound is slightly cloudy. 3) Add a small amount of EtOH until the solution is just clear (still hot). 4) Cool to RT. Upon cooling to RT you notice that the compound is not precipitating out of solution. You decide to boil off some ethanol. Upon completing this step and cooling to RT you notice that the compound is precipitating out as desired! In which solvent is your compound the least soluble? Ethanol O Water O The ethanol water mixture Insoluble in all of these solvents

An organic chemistry laboratory Extraction; the extraction of crude naphtalene- benzoic acid mixture. Naphthalene is a suspect carcinogen and is toxic to aquatic life. Find an alternative pair of molecules that adhere better to the principles of green chemistry and can be separated by extraction using green' solvents. (kindly answer fully)

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Diethyl ether and methylene chloride are generally not suitable for use in recrystallization, but are frequently used as extraction solvents. Explain