What layer is contained in the bottom and top? Then, 15% sulfric acid was added to solution and was filtered using a vacuum filtration. Product was then dried and weighed. What is the name of this compound that was extracted?
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Experiment is over recovering an organic acid from a mixture.
0.9-1.1 grams of premixed p-nitrotoluene/p-nitrobenzoic was weighed then mixed with 60mL of diethyl ether.
Solution was put through a separatory funnel and 15mL of 5% sodium hydroxide was added. (Shaken and ventilated). Aqueous and organic solution was separated from each other. organic solution was returned to separatory funnel and 15 ml of fresh sodium hydroxide was added.
What layer is contained in the bottom and top?
Then, 15% sulfric acid was added to solution and was filtered using a vacuum filtration. Product was then dried and weighed.
What is the name of this compound that was extracted?
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- Please type all of the parts to this question occordingly to the instructions. Here is an example of a formal procedure based off of the experiment presented in Mohrig:Sodium hydroxide (4.6 g) was dissolved in water (25 mL). This solution was added to a 100 mL round bottom flask along with methyl salicylate (2.0 mL) and a stir bar. The mixture was heated at reflux for 15 min and then progressively cooled to 5 °C. The solution was acidified with 3M sulfuric acid (15-20 mL), and the resulting solid was collected by vacuum filtration. The crude salicylic acid was recrystallized from water to yield ???? g of final solid. The melting point and IR were taken to assess purity. Calculate the molarity of the solution of sodium hydroxide that is used.a. M = b. If the original procedure is the base scale (100%), how far are we scaling down the reaction when using 0.75 mL of methyl salicylate? (Example: the original uses 2.0 mL, if we were to use 1.0 mL, we would be scaling the reaction down…Provide a mechanism, including intermediates, for the following procedure Charge a 100 mL round-bottom flask with 40mL of 2 M pentanolic KOH solution, 5.0g of PET shavings, and a stirring bar. Heat the mixture to a gentle reflux and keep it refluxing for 2 hours with continuous stirring. Cool the reaction mixture and add 25 mL of water to dissolve the white terephthalate salt. Filter the solution using a Büchner funnel to remove undissolved PET. Transfer the filtrate to a separatory funnel and remove the bottom aqueous layer. Wash the pentanolic layer with an additional 25 mL of water, remove the bottom layer, and combine with the other aqueous layers. Add 2 M HCl to the aqueous layer while stirring until a precipitate that does not dissolve forms. Add the same volume of HCl again (approximately 30 mL or more) to fully protonate the compound. Collect the solid by suction filtration and air-dry it to obtain 4.138 g with a melting point above 400 °C. Set aside 0.5-1 g of the sample for…Considering the procedure below: “Determination of the concentration of HCl: Pipette 10 mL of hydrochloric acid and transfer to a 100 mL volumetric flask, complete the volume with water and homogenize. Remove a 10 mL aliquot of this solution and transfer it to a second dilution in a 100 mL volumetric flask, complete the volume with water and homogenize. Take a 20 mL aliquot of this last solution and transfer to a 250 mL erlenmeyr and add 20 mL of distilled water and 4 drops of the acid-base indicator. Titrate with a previously standardized 0.100 mol/L sodium hydroxide solution until the indicator turns.” Answer: a) In this titration, the indicator used is phenolphthalein. Discuss the use of this indicator considering its turning range and pH at the stoichiometric point of the titration. Justify. b) Considering that the volume of titrant used was equal to 24.5 mL, calculate the concentration of HCl in the sample in mol/L.
- What is the purpose of using NaOH in an extraction experiment? Mark all that apply. Question options: A To acidify the aqueous layer so the organic acid precipitates out of solution B To remove traces of water from the ether layer so neutral compound is dry C To react with the organic neutral compound and remove it from ether layer D To react with organic acid compound to produce water-soluble salt and extract it into aqueous layer I did put C and D but wrong. I did put only D but also wrong. I put B and D also wrong.MAKE A METHODOLOGY : MATERIALS/ REAGENTS WITH SCHEMATIC DIAGRAM . THE PICTURE UPLOADED SERVES AS A GUIDE, DO THE SAME THING BASED FROM THE PIC. Procedure: Place 20 drops of each of 0.2M CuSO4 in a centrifuge tube. Then add 5 drops of freshly prepared 6M (NH4)2S to each centrifuge tube. Record your observation. Centrifuge the mixtures for 3 mins. and decant the supernatant liquid. Add 10 drops of DI water and 10 drops of 6M HNO3. Stir and boil the mixture in a hot water bath for 5 mins. centrifuge the mixture for 3 mins. Decant the supernatant solution from procedure 3. Discard the To each of the supernatant liquid, add 6 drops of 6M H2SO4. Allow themixtures to cool and 5 drops of DI water. To the mixtures in procedure 4, add few drops of concentrated NH3 until the solution becomes basic. Confirm using a litmus paper. Record your observation. Add 1 drop of 5M NaOH and 1 drop of 0.1 M SnCl2 to the centrifuge tube containing Bi3+ ion , centrifuge and decant the supernatant liquid. To…Each of the student statements below is wrong. Explain why they are not correct. (a) All my compound dissolved right away in the small amount of solvent I added at room temperature, and I didn’t need to heat it at all. This means I’m going to get lots of pure compound out. (b) I did a recrystallization of naphthalene and my percent recovery was very high (99%), so I must have pure product. (c) When you’ve dissolved all your compound in hot solvent, and you’re in a hurry, it’s ok to just place it straight into the ice bath.
- 6.0 mL of cyclohexanol, 8 mL of 85% phosphoric acid, and 10 drops of sulfuric acid are added to a 50-mL round-bottom flask with boiling chips, and the mixture is distilled into an ice-cooled receiver. The distillate is in the form of a colorless bi-phasic mixture. The cyclohexene upper layer is removed from the water layer, and dried over anhydrous calcium chloride. Isolated is cyclohexene as a clear and colorless foul-smelling liquid. Weighing data is given below. Gross mass: 51.24 g Tare mass: 48.04 g Product mass: 3.2g Question: Calculate the theoretical mass of the cyclohexene product, bearing in mind that the cyclohexanol starting material was measured by volume, not by mass (so you must use the density of cyclohexanol to convert milliliters to grams, before calculating the number of moles). Calculate the percent yield of cyclohexene obtained.Which of the following observations is INCORRECT? a. 4-aminophenol: wine red solution in FeCl3 b. Phenol: white precipitate in Br2 in water c. 3,5-dimethyl-1-hexanol: No layer formation in Lucas reagent d. 3,6-dihydroxycycloheptanone: decolorization of solution in KMnO4 testWrite the equations for the acid-base reactions involved in this experiment. Clearly show the reactants and products for each chemical equation. Experiment: seperation of caffeine and benzoic acid by acid-base extraction Things used in lab: -solid mixture of caffeine and benzoic acid -40mL of dichloromethane -20mL of 1.0 M NaOH -magnesium sulfate as drying agent for caffeine isolation -3.00 M HCl for recovery of benzoic acid
- Your employer hands you a heterogeneous mixture and asks you to isolate all of thehexane that you can from it. After some analysis, you determine that the mixture contains toluene, hexane,benzoic acid, water, sodium chloride, and sand. Explain how you would isolate pure hexane from thismixture. Remember that you can use techniques such as filtration, extractions, and acid/base chemistrythat we learned earlier in this course in addition to distillation. You may need to look up solubilities and/orboiling points online to solve this problem. You only need to isolate the hexane?Propose a extraction flowchart capable of seperating this mixture into its pure form3 Draw a flow chart to shows the strategy for separation of three compounds: Phenanthrene and 4-Aminoacetophenone and 1,4-Dibromobenzen and dissolve mixture is Diethyl ether. add NaOH (1M) and (6M) to the aqueous layer and ether layer..