Draw the synthesis setup for Ni(dppf)Cl2, make sure to include the round-bottom flask, reflux condenser, hotplate, and the connections to the vacuum and water-cooling systems
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Draw the synthesis setup for Ni(dppf)Cl2, make sure to include the round-bottom flask, reflux condenser, hotplate, and the connections to the vacuum and water-cooling systems.
Design an experiment remove separate Ca2+ and herbicide Atrazin (organochloride) from aqueous salt solution.
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- 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.In this lab you used acid/base extraction to remove acidic impurities, how could basic impurities be removed through extraction? Imagine the two compounds below are both dissolved in ethyl acetate (a standard organic solvent for extractions), create a diagram/flow chart that outlines steps that could be taken to separate them through acid/base extraction and recover each compound in its neutral Be sure to track when each compound is in the organic or aqueous layer.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?
- Create a chemical equation based on this procedure below depicting the reaction being conducted. It should include ALL starting materials, catalysts, and solvents, as well as the product, but omit sulfur dioxide. Make sure the product has a proper name, along with molar mass Mix 2.5 g of sulfolene, 5 mL of xylene, and 1.25 g of maleic anhydride in a 50 mL round bottom flask. Fit the flask with a water‐cooled reflux condenser. Heat the contents of the flask using the thermowell until the xylene begins to gently reflux, and then maintain the reflux for 45 minutes. Once the reaction mixture has refluxed for 45 minutes, turn off and lower the thermowell, allowing the flask and solution to cool to room temperature. After the flask has reached room temperature, cool in an ice bath. Collect the crude product by vacuum filtration. To purify the crude product, recrystallize in 2:1 v/v1 xylene : hexane. Wash the crystals with hexane and allow the recrystallized product to air dry in the…Using the table on slide 7, what ORGANIC solvent could you use to do an extraction of something fromisooctane? What about from acetic acid? b. On slide 7, it says the solvents in grey would not work to extract an aqueous layer. Why not? 6. a. So if you were trying to extract 15mL of an aqueous layer, why wouldn’t you want to use 45mL of theorganic solvent? Why would 20mL be better? b. Why wouldn’t you use 2mL of the organic solvent?Will the melting point increase or decrease with the benzoic acid, 4-chloroanaline, and naphthalene if : -You do not remove all of the HCl from the first extraction (mixture) -You forget to do the NaOH extraction (aq layer) -You do not rotovap all of the solvent in the final step (organic layer)
- You are performing an aqueous extraction, and you forget which layer is the organic layer and which is the aqueous layer. What is the best way to solve this problem? a. Add a small amount of sodium sulfate - if it dissolves, the layer is water. b. Remove all the solvents via rotary evaporation and start again. c. Pick the top layer, as this is always the organic layer. d. Smell the two layers to see which one is an organic solvent.Develop a numbered procedure for the fischer esterification of butyric acid and ethanol including moles, grams, and volume used for all reactants and show how many grams you are expected to produce (show calculations). What will be the IR peaks expected?1. A student wants to dry a solution of aniline in hexane. Which drying agent should he use for the task? Rationalize the choice. 2. If calcium oxide is used as a drying agent, what is obtained as a product? 3. Why is ill-advised to use P4O10 as drying agents for “wet” acetone?
- 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 procedureWhy is it important to thoroughly vortex the contents of the vial after adding reagent 4 (Steps 3 and 4., stage 1). To ensure that the two immiscible solvents come into contact with each other, permitting the derivatization reactions to occur. B.To ensure that the solution is mixed thoroughly. To ensure that all the amino acids are transferred to the lower aqueous layer so that a full extraction occurs. To remove all the interferring compounds by transferring them to the upper organic layer Hint: Reagent 4 is the derivatizing agent dissolved in octane.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.