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- Why 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.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.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…
- Synthesis of Orange II dye. During vacuum filtration, is it possible to use cold water for rinsing/collecting the Orange II dye? Clearly explain why or why not.What is the purpose of the following? b) Adding H2SO4 to the methyl benzoate in the nitration reaction. c) Adding boiling chips.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?
- 2. With an example describe mechanistically how an extraction is carried out acid-base.1.For this part of the experiment, watch the video on the link below: https://www.youtube.com/watch?v=eX3JiKmenuU&t=7s 2.Note the color of the cupric sulfate pentahydrate before and after heating. Question: Observations before heating. Observations after heating.At the start of lab, Anthony adds vanillin to his Erlenmeyer flask, then adds sodium hydroxide, and lets the suspension cool. i. With minimal words, identify the reaction that takes place between sodium hydroxide and vanillin. ii. Is sodium borohydride capable of inducing the same reaction as (i)?
- For an acid-base experiment with access to DCM, HCl & NaOH,trying to seperate a mixture of caffeine, benzoic acid and cellulose, can someone explain how this experiment can be conducted? with the chemicals included andinstrumentationMultistep synthesis of Lidocaine Lab 1) How many grams of starting material do you need? It is given in moles below but how many grams? 2) How to calculate theoretical yield? Part One Method A. Preparation of alpha-Chloro-2,6-dimethylacetanilideCombine 0.033 mol of 2,6-dimethylaniline with 25 mL of glacial acetic acid (or ethyl acetateor THF) and 0.033 mol of alpha-chloroacetyl chloride, in that order, in an appropriately sized Erlenmeyer flask. With the aid of a hot water bath, warm the solution to 40-50°C, remove the flask from the bath, and add a solution of 5 g of sodium acetate trihydrate dissolved in 100 mL of water.Calculate the theoretical yield of virstatin ethyl ester and virstatin. Procedure – Step 1 Synthesis of virstatin ethyl ester (with notes and musings about procedural steps in italics) 1,8-naphthalimide (0.25 g) and potassium carbonate (0.26g) are added to a 10 ml round bottom flask containing a stir bar. 1.3 ml DMF (N,N-dimethylformamide) is added to the flask. The DMF will be in a “sure seal” bottle with a septum. You will obtain the DMF using a syringe and needle. Wear gloves when obtaining and dispensing the DMF. Add ethyl 4-bromobutanoate (0.27 ml) (it might say ethyl 4-bromobutyrate on the bottle) to the reaction flask, using an automatic pipet. Heat under reflux, with stirring, for 1 hour. What will the sand temperature have to be to get DMF to boil?? When would you start heating the sand!? After cooling to room temperature add 5 ml water to the reaction solution and cool the resulting mixture in an ice bath. Using a Buchner funnel, vacuum filter the ice cold…