Acid-base extraction :benzoic acid, p-nitroaniline and azobenzene dissolved in dichloromethane 1.Device a flow chart that outlines the separations performed in this experiment 2. Write down all the chemical reactions that occur in the extraction procedure
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A: Step 1 Since you have asked multiple questions, we will solve the first question for you. If you…
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A: We can purify the partially oxidised benzaldehyde as follows.
Q: why is it necessary to cool the acidic exact of aniline in ice before adding solid sodium hydroxide?
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Q: Why is excess ammonia used in the preceding reaction?
A: The preceding reaction is as given below:
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Q: Sodium hydroxide was used to help separate benzoic acid and fluorenone because deprotonated benzoic…
A: Given that, NaOH was used to help separate benzoic acid and fluorenone, because deprotonated benzoic…
Q: What is the reason for using as little ethanol as possible to dissolve the crude product before…
A: For recrystallization, it is recommended to use minimum solvent to support the goal of recovering…
Q: Device a flow chart that outlines the separations performed in acid-base extraction. Acid- benzoic…
A: Given Acid- benzoic acid Base- p-nitroaniline Neutral compound - azobenzene
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A: A chemical reaction is a mechanism that converts one or more substances, known as reactants, into…
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A: Answer Theoretical yield = 1.1321 g Percent yield = 50.61 % Given: Mass of Phenyl bromide…
Q: 4. What one main factor was demonstrated in your experiment regarding solvent extraction?
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A:
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A: The reaction of 1-bromobutane with sodium ethoxide is as follows.
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Q: 4. To isolate the benzoic acid from the ether layer, you extracted with base. (a) An alternate…
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A: Reduction means addition of Hydrogens to The functional group.
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A: The flow chart for the extraction of given compounds has been shown below:
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Acid-base extraction :benzoic acid, p-nitroaniline and azobenzene dissolved in dichloromethane
1.Device a flow chart that outlines the separations performed in this experiment
2. Write down all the
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- Practical and Efficient Synthesis of N-Formylbenzotriazole 1. ProcedureA 500-mL, 3-necked, round-bottomed flask (Note 1) equipped with a 5 cm Teflon-coated cylindrical magnetic stir bar, an internal thermometer, a rubber septum, and a Vigreux condenser capped with a rubber septum with an argon inlet, is charged with acetic anhydride (26.5 mL, 28.6 g, 280 mmol, 1.0 equiv) (Note 2). The contents are cooled to –10 °C by means of a Dewar filled with isopropanol and an immersion cooler (Neslab CC 100) (Note 3), then 100% formic acid (21.1 mL, 25.8 g, 560 mmol, 2.0 equiv) (Note 4) is added in portions to the flask over 3 min via a measuring cylinder [Caution: exotherm from –10 °C to 1 °C]. The resulting colorless reaction mixture is then heated in an oil bath on a hot plate to 43 °C (internal temperature) over 25 min. The reaction mixture is stirred vigorously for 3 h (42–44 °C, internal temperature) and monitored by 1H NMR analysis (Note 5).1H NMR analysis of crude reaction aliquots is…1.Device a flow chart that outlines the separations performed in acid-base extraction. Acid- benzoic acid Base- p-nitroaniline Neutral compound - azobenzene 2. Write all chemical reactions that occur in the extraction procedure.Propose an extraction flowchart capable of separating this compound into its pure form
- In most distillations, the total volume of liquid obtained (distillate + residue) is possible sources of loss in this procedure?TLC, a powerful analytical tool, can be used to monitor the progress of reactions. The synthesis of ethyl-3-coumarincarboxylate can be monitored by TLC by displaying the starting aldehyde 1, and coumarin product 2, which have very distinct Rf values (Hint: Think about the polarity of compounds 1 and 2 in terms of their abilities to H-bonds to silica gel). What can be determine about the progress of the reaction from analysis of the TLC shown below?Sodium hydroxide was used to help separate benzoic acid and fluorenone because deprotonated benzoic acid (sodium benzoate) favorably partitions into the aqueous phase (and fluorenone does not). Would this procedure have worked without the sodium hydroxide (using simply neutral water)? Why or why not?
- 1. Why was extraction by both acid AND base necessary to arrive at highly purified benzoic acid?In UV spectroscopy we are taught the effects of polarity on liquid chemistries that may undergo bathochromic red shif, hypochromic blue shift , hypsochromic decrease in absorbance and aborptivity and hyperchromic effects a increase in absorbance or absorptivity. The cause for hyperchromic shifts has one explanation that appears to make sence and that is related to Auxochromic groups or the effect on the chromophore for for a new chromophore with the auxo group that causes both a hyperchromic and bathochromic red shift. Question 1: Does this dual shift in absorbance and wavelength occur in non-liquid sustances like plastics e.g. polypropylene, polyethylene, condensation polymers like PET and Polycarbonate? Question 2: Is there a way to predict level of hyperchromic shift based on the auxochromic group or do we need to know the chromophore? Question 3: Are there known examples of chromophore and Auxochromic groups that provide various molar extinction or absorptivity or absorbance…What is/are the limiting reagent(s) for this three-step procedure? Why is sodium borohydride not the limiting reagent even though a smaller number of moles of this reagent are used? Mass/volume used in experiment: O-vanillin = 0.760g P-toluidine = 0.535g Ethanol = 15 ml Sodium borohydride = 0.1 g Glacial acetic acid = 2 ml Acetic anhydride = 2 ml
- For the reaction below; estimate how a TLC-analysis would look like (assume you have asolvent mixture where A-C separates.a) At the start of the reactionb) After 65 % conversionc) After full conversion of A.d) What is the functional group of each compoundSTARTING WITH 18MG OF 2-methyl-2-butanol JUST B PLEASE (b) theoretical volume of alkene mixture (ml) expected to be obtained in this experiment.Melting point range Recrystallized Phenacetin 95-100 Recrystallized Phenacetin + Reference Phenacetin 110-115 Recrystallized Benzil 92-95 Recrystallized Benzil + Reference Benzil 94-98 Questions: 1. What does your melting point say about the purity of your phenacetin sample? Justify your answer using the characteristics of mixed melting point. 2. What does your melting point say about the purity of your phenacetin sample? Justify your answer using the characteristics of melting point. 3. What are two characteristics of a good recrystallization solvent for a given compound? 4. Given a solid sample that contains impurities, how would you determine which solvent to use for a recrystallization? Describe how you would do this in the laboratory. 5. Clearly explain the difference between a recrystallization and a precipitation.