REACTION1. Using a burette, measure the cyclohexene (6.0 mmol) and transfer toa 125 mL erlenmeyer, along with acetone ([Cyclohexene] = 1 M). Adda stirbar.2. Cool the solution in an ice-bath for 10 minutes with magnetic stirring.3. Meanwhile, in a 2nd 125 mL erlenmeyer, dissolve Oxone (15.6 mmol) indeionized water ([Oxone] = 0.60 M).4. Attach a ring-clamp right over your flask. Add a closed separatoryfunnel, such that the bottom tip is partially inserted in the flask.5. Add your Oxone solution into the separatory funnel.6. When your cyclohexene solution is sufficiently cold, gently open thebottom valve of the separatory funnel to add the Oxone solution.Adjust the valve to obtain a flow of approximately 1–2 drops/second.7. Once the addition is complete, rinse the sepamillilitres of water.ory funnel with a few8. Remove the flask from the ice bath, and allow the reaction to stir atroom temperature for 20 minutes.9. After 20 minutes, add 12.5 M HCI (14.9 mmol) dropwise to the stirringsolution. Allow the reaction to stir for 10 minutes before proceedingwith liquid-liquid extraction (p.8).PURIFICATION– LIQUID-LIQUID EXTRACTION1. Assess the success of your reaction by performing a TLC on your crude reaction mixture. (See TLCprotocol below for details)2. Pour your resulting reaction mixture into 30 mL of water in a separatory funnel.3. Add 5 mL of ethyl acetate, and shake vigorously.|4. Drain the aqueous and organic layers into separate erlenmeyer flasks.5. Return the aqueous layer to the separatory funnel. Extract it two more times with additional 5 mL portionsof ethyl acetate, mixing well.|6. Drain the final aqueous layer. Add all of the organic fractions back into the separatory funnel.7. Wash the combined organic phase by adding 5 mL of clean water to the separatory funnel and mixing well.8. Drain both layers separately into their respective erlenmeyers.9. Analyze the purified organic extract by TLC using the protocol below.9) Liquid-liquid extraction is used here to purify the mixture obtained at the end of thereaction. For your respective reactionthe different species potentially found in solution at the end of the reaction to partitionbetween the organic and aqueous layers during the liquid-liquid extraction step? Explainyour prediction.Oxone), how you would expect

Liquid Liquid extraction is a technique of separating components of mixture using two immiscible…

Liquid-liquid extraction is used here to purify the mixture obtained at the end of the reaction. For your respective reaction the different species potentially found in solution at the end of the reaction to partition between the organic and aqueous layers during the liquid-liquid extraction step? Explain your prediction. Oxone), how you would expect

Liquid-liquid extraction is used here to purify the mixture obtained at the end of the reaction. For your respective reaction the different species potentially found in solution at the end of the reaction to partition between the organic and aqueous layers during the liquid-liquid extraction step? Explain your prediction. Oxone), how you would expect

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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1. Using a burette, measure the cyclohexene (6.0 mmol) and transfer to a 125 mL erlenmeyer, along with acetone ([Cyclohexene] = 1 M). Add a stirbar. %3D a) How much acetone is required for the reaction?
1. Using a burette, measure the cyclohexene (6.0 mmol) and transfer to a 125 mL erlenmeyer, along with acetone ([Cyclohexene] = 1 M). Add a stirbar. 2. Cool the solution in an ice-bath for 10 minutes with magnetic stirring. 3. Meanwhile, in a 2nd 125 mL erlenmeyer, dissolve Oxone (15.6 mmol) in deionized water ([Oxone] = 0.60 M). 4. Attach a ring-clamp right over your flask. Add a closed separatory funnel, such that the bottom tip is partially inserted in the flask. 5. Add your Oxone solution into the separatory funnel. 6. When your cyclohexene solution is sufficiently cold, gently open the bottom valve of the separatory funnel to add the Oxone solution. Adjust the valve to obtain a flow of approximately 1–2 drops/second. 7. Once the addition is complete, rinse the separatory funnel with a few millilitres of water. 8. Remove the flask from the ice bath, and allow the reaction to stir at room temperature for 20 minutes. 9. After 20 minutes, add 12.5 M HCI (14.9 mmol) dropwise to the…
Really hoping for solutions since I’m having a hard time with this. Pls. skip if unsure or not willing to answer the subitems (these are all connected for one item). Thanks in advanced. Whe‎n the com‎pounds analy‎zed by Robro‎b were p‎assed on to the ne‎xt test, ano‎therscientist, Kik‎oko, ne‎eded to det‎ermine the mo‎lecular wei‎ght of the ac‎tive comp‎ound. They creat‎ed a sol‎ution with a conc‎entration of 20.0%w/w from the so‎lid active compo‎und and the so‎lution had a de‎nsity of 1.40 g/mL. From this sol‎ution, 10μL was take‎n and mixed with 190μL of re‎agent and water. It was analy‎zed and sh‎owed a concentra‎tion of 5x10-4 M compound.a. W‎hat is the conc‎entration (in molarity) of the 20%w/w solu‎tion? b. W‎hy was the concentra‎tion of the ‎solution ex‎pressed as %w/w initially? c. Wh‎at is the molecul‎ar weight of the activ‎e com‎pound?
When the compounds analyzed by Robrob were passed on to the next test, another scientist, Kikoko, needed to determine the molecular weight of the ctive compound. They created a solution with a concentration of 20.0%w/w from the solid active compound and the solution had a density of 1.40 g/mL. From this solution, 10µL was taken and mixed with 190µL of reagent and water. It was analyzed and showed a concentration of 5x10-4 M compound. a. What is the concentration (in molarity) of the 20%w/w solution? b. Why was the concentration of the solution expressed as %w/w initially? c. What is the molecular weight of the active compound?
Provide details about the reaction workup. 4,4'-DIBROMOBIPHENYL [Biphenyl, 4,4'-dibromo-] Submitted by Robert E. Buckles and Norris G. Wheeler1. Checked by R. S. Schreiber, Wm. Bradley Reid, Jr., and Robert W. Jackson. 1. Procedure In a 15-cm. evaporating dish is placed 15.4 g. (0.10 mole) of finely powdered biphenyl (Note 1). The dish is set on a porcelain rack in a 30-cm. desiccator with a 10-cm. evaporating dish under the rack containing 39 g. (12 ml., 0.24 mole) of bromine. The desiccator is closed, but a very small opening is provided for the escape of hydrogen bromide (Note 2). The biphenyl is left in contact with the bromine vapor for 8 hours (or overnight). The orange solid is then removed from the desiccator and allowed to stand in the air under a hood for at least 4 hours (Note 3). At this point, the product weighs about 30 g. and has a melting point in the neighborhood of 152°. The crude 4,4'-dibromobiphenyl is dissolved in 75 ml. of benzene, filtered, and cooled to 15°.…
Which of the followings is the important feature for choosing a good solvent for any recrystallization? O a. The compound of interest should be soluble in the solvent at high temperatures, but insoluble at room temperatures o b. c. The compound of interest should be insoluble in the solvent at high temperatures, but soluble at room temperatures O d. The compound of interest should be soluble in the solvent at all temperatures O E. The impurities must be insoluble in the solvent at high temperature
Questions 1. Which are the impurities that indicate the substandard preparation? 2. Why does the reaction have to be carried out in nitric acid? 3. What are the differences of limit test for purified water in bulk and purified water in containers? 4. Which impurities that the limit test using comparison method? 5. What is the essential equipment for limit test using comparison method? And what is the specific specification of this equipment? 6. Which test has been conducted based on the principle of redox reaction? 7. Which test(s) has been conducted based on the principle of semi-quantitative?
Which of the following could DECREASE the amount of the recovered crystals in the purification by recrystallization experiment? Collecting the recrystallized benzoic acid by filtration using a pre-weighed filter paper. Using a long-stemmed funnel in the hot filtration step. Cooling the filtered solution rapidly. Washing the recovered crystals using hot solvent. a. II, III b. II, IV c. II, III, IV d. I, II, III, IV
Given your choice of Flame AA, ICP-AE, XRF, El-MS, or none of these, and keeping in mind that cost matters, which would you use a. for a nondestructive measurement of a sample? b. to determine 10ppm Zn in a solution? c. to determine the amount of Br in a mixture of KBr. KCL and KI? d. to determine the number of Bratoms in a molecule of an organic liquid? e. to determine 10ppb of Fe in motor oil?
02:21 4G File Details 4CH003/UM1: Fundamentals of... Introduction Perhaps the cleanest method of conducting an oxidation is by catalytic oxidation, since this minimizes the problem of removal of unwanted by- products. However, the conditions used are often vigorous and require the use of specialized equipment. By comparison, the product of a "chemical" oxidation may be more difficult to purify due to the presence of the reduced form of the oxidizing agent and potential "tars" that may arise from "over- oxidation". Because chemical oxidation can be carried out using conventional equipment they are more popular. dissolving sodium or potassium dichromate in acid is a commonly used oxidizing agent, being classed as a relatively powerful oxidant and having water soluble by-products (Cr III salts). Sulphuric acid is generally used if the material to be oxidized is water soluble and glacial acetic acid is used if it is Chromic acid, prepared in-situ by not. Alcohols are readily oxidized to…
Table 2. Calculations ~60°C trial ~50°C trial ~40°C trial ~30°C trial ~20°C trial Vol. of HCI used (mL) 19.87 12.93 12.37 9.03 6.30 Moles of HCI used (mol) 9.94 6.47 6.19 4.52 3.15 Moles of borate present (mol) [Borate] (M) Ksp In(Ksp) 1/T (K-1)
49. R Lactic acid Salicylic acid Trichloroacetic acid Flexible collodion qs ad Sig: wart remover. Use as directed. 48 5 g 452 to an to 2 g 100 g a. Flexible collodion contains 20% w/w camphor and 30% w/w castor oil. How many grams of each would be contained in 100 g of the mixture? b. The specific gravity of castor oil is 0.955. How many milliliters of the oil are contained in 100 g of the mixture? c. If the specific gravity of the mixture is 0.781, what are the percent w/v concentrations of lactic acid, salicylic acid, and trichloroacetic acid in the mixture?