A sample of sec-phenethyl alcohol (MW = 122.17 g/mole) was found to be 93% optically pure in favor of the levorotatory enantiomer. For a 12.86 g sample of this material, what would be the enantiomer composition by weight? The specific rotation for enantiomerically pure sec-phenethyl alcohol is 42 degrees.
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A sample of sec-phenethyl alcohol (MW = 122.17 g/mole) was found to be 93% optically pure...
3. Pure Θ Kaylanoic acid has a specific rotation of-160° (same conditions and temperature as sample above). What is the % optical purity of the sample above ? (0.75 points) 4. 3.5 mg of optically-enriched(-) antibiotic Zachromycin was dissolved in 1.00 mL methanol in a 1.00 mL volumetric flask. The optical rotation was found to be -0.02220 in a 5.0 cm cell. What is the specific rotation? (0.75 points) 5. Calculate the enantiomeric excess and the specific rotation of a...
Question 2: An aqueous solution containing 4.23 g of an optically pure compound, (+)-Porgsareawesome (MW = 213.4 g/mol) was diluted to 700.0 mL with water and placed in a polarimeter tube 15.0 cm long. The measured rotation was +90' at 25.0'C. a) On the answer sheet provided, set up the equation to give the compound's specific T = rotation - you do not need to do any actual math! Hint: Make sure to use proper units. Use the equation at...
Question 2: An aqueous solution containing 4.23 g of an optically pure compound, (+)-Porgsareawesome (MW=213.4 g/mol) was diluted to 700.0 mL with water and placed in a polarimeter tube 15.0 cm long. The measured rotation was +90' at 25.0'C. a) On the answer sheet provided, set up the equation to give the compound's specific rotation - you do not need to do any actual math! Hint: Make sure to use proper units. Use the equation at left as your guide:...
Please help with pre-lab questions.
Pre-Lab Questions: 1. A sample of 2-butanol has a specific rotation of +3.25. Determine the optical purity (%ee) and percent composition of this sample (see Mohrig section 17.4). The specific rotation of pure (+)-2-butanol is +13.0°. 2. The equation for the formation of the diastereomeric salts is shown in the background information (performed in Part A of the procedure). Write this chemical equation in your notebook, then ALSO write a balanced equation for the formation...
10. Write a one-page summary of the attached paper? INTRODUCTION Many problems can develop in activated sludge operation that adversely affect effluent quality with origins in the engineering, hydraulic and microbiological components of the process. The real "heart" of the activated sludge system is the development and maintenance of a mixed microbial culture (activated sludge) that treats wastewater and which can be managed. One definition of a wastewater treatment plant operator is a "bug farmer", one who controls the aeration...