4. To isolate the benzoic acid from the ether layer, you extracted with base. (a) An alternate simpler procedure would have been to just evaporate the ether with a burner or hot plate. Why was this method not used? (b) A third method would have been to evaporate the ether on the steam bath. Why this method not work?
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- why is it necessary to cool the acidic exact of aniline in ice before adding solid sodium hydroxide?How much of the bezaldehyde from c was dissolved in the ether layer after the first separation?Answer the following question regarding the pictures please: The information for this set is based off of the column separation of ferrocene and acetylferrocene. D:What makes ethyl acetate a suitable or unsuitable solvent? ethyl acetate is too polar there would be no issues separating the three compounds using ethyl acetate as the solvent ethyl acetate is not polar enough E: What concerns would you have if you were to run a column using hexanes as the solvent for the whole column? hexanes is too polar and there would be no separation for the three compounds hexanes would be a good solvent to isolate all three compounds from the column hexanes is not polar enough to elute diacetylferrocene hexanes is not polar enough to elute any of the compounds no matter how much solvent you use F: Come up with an appropriate solvent gradient to get the best separation of all three compounds, list them first to last
- For extraction with ethyl-4-aminobenzoate and naphthalene using dichloromethane as the solvent, how does one separate the two compounds from one another?why is acetic acid added after homogenization in extraction and isolation?what will happen to the reaction of acetone in the sodium nitroprusside Test and in the iodoform test? what will happen if liquid Benzaldehyde is exposed into the air?
- Provide a forward synthesis for parts a and b. Using retrosynthetic analysis could help.Can you solve all the parts to this question A. Why can’t you separate (+) and (-) phenylsuccinic acid using a simple recrystallization? B. After the two enantiomers are separated, how can you check the purity of the final solid (how can you determine if it is pure (+)-phenylsuccinic acid)?Write a cleare scientific prosedure of preparing p-creaol from phenol in laboratory, what is the physical properties and safety requirements for all reagent and chemicals used in procedure, and what is the purification technique that will used to purify p-cresol at the end?
- What type of reaction is a Grignard reaction? What is the critical intermediate (which can be isolated and enables the final product)? Why should water be excluded from a Grignard reaction? Since this is the case, why does just addition of a cotton ball work for our reaction setup? Why was extraction by both acid AND base necessary to arrive at highly purified benzoic acid? If we wanted to improve our set-up, we could have added a desiccant between two cotton plugs. Why is this much better than adding drying agents such as Na2SO4directly into the solution? If we had gotten less than 50% yield for the overall process, what is at least one likely source of loss?Q1: Give one lysis buffer that is commonly used for western blotting experiments and include its components Q3: To make sure that you used a similar amount of samples, what important step should be done before proceeding the electrophoresis stage? Q4. Why is it necessary to store the prepared lysates in a very low temperature?Write a scientific procedure (experimental) to bromonation p-cresol by the addition of NBS . What if the purification method at the end?