Macroscale and Microscale Organic Experiments
7th Edition
ISBN: 9781305577190
Author: Kenneth L. Williamson, Katherine M. Masters
Publisher: Brooks Cole
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- Can you please answer question Part D by details pleasearrow_forwardThe observed rotation for 100 mL of an aqueous solution containing 1 g of sucrose, placed in a 2-decimeter sample tube, is +1.33 degrees at 25 degrees C (using sodium lamp). Calculate the specific rotation of sucrose.arrow_forwardQ 4 pleasearrow_forward
- View Policies Current Attempt in Progress When 0.234 g of monosodium glutamate (MSG) is dissolved in 10.0 mL of water and placed in a sample cell 10.0 cm in length, the observed rotation at 20°(using the D line of sodium) is +0.599°. Calculate the specific rotation of MSG. specific rotation = [a] = i eTexthook and Mediaarrow_forwardThe specific rotation for a pure enantiomer is known to be -45 g- mL-1 dm-1. A sample containing both enantiomers is found to have an observed rotation of -0.50° in a 1dm tube at a concentration of 4.2g/100 mL. What is the optical purity of the sample? O a. 20.6% Ob. 30.8% Oc. 26.4% O d. 36.5%arrow_forward1. When 0.247 g of monosodium glutamate (MSG) is dissolved in 10.0 mL of water and placed in a sample cell 10.0 cm in length, the observed rotation at 20°(using the D line of sodium) is +0.632°. Calculate the specific rotation of MSG. 2. When 0.095 g of cholesterol is dissolved in 1.00 mL of ether and placed in a sample cell 10.0 cm in length, the observed rotation at 20°C (using the D line of sodium) is -0.299°.Calculate the specific rotation of cholesterol.3. The specific rotation of L-dopa in water (at 15°C) is -39.5. A chemist prepared a mixture of L-dopa and its enantiomer, and this mixture had a specific rotation of -34. Calculate the % ee of this mixture. 4. The specific rotation of vitamin B7 in water (at 22°C) is +92. A chemist prepared a mixture of vitamin B7 and its enantiomer, and this mixture had a specific rotation of +18. Calculate the % ee of this mixture.arrow_forward
- A. When one of the enantiomers of 2-butanol is placed in a polarimeter, the observed rotation is 4.050 counterclockwise. The solution was made by diluting 6.0 grams of (-)-2-butanol to a total of 40.0 mL and the solution was placed into a 200 mm polarimeter tube for the measurement. Determine the specific rotation for this enantiomer of 2-butanol. Show work using the equation function (insert tab of the editing menu above) to receive credit. Uploaded answers or work without using the equation function, will not be graded. B. What will be the specific rotation of the dextrorotatory enantiomer?arrow_forwardNonearrow_forwardplease answerarrow_forward
- The 4th problemarrow_forwardNonearrow_forwardMe/H 3.8 Me/Me 15.5 You are trying to determine the optical purity (% enantiomeric excess) of a compound that you have just synthesized. You measure the rotation of plane-polarized light of a 0.5 g/mL solution and find the rotation to be +16.2 degrees (clockwise). Given the pure (-) isomer has a specific rotation of -45 degrees, what is the optical purity of the compound? Show, work. yourarrow_forward
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