3. (+)-Tartaric acid has a specific rotation of +12.0°. Calculate the specific rotation of a mixture of 68% (+)-tartaric acid and 32% (-)-tartaric acid. b 1.00 g of sample is dissolved in 20.0 mL of ethanol. Then 5.00 mL of this solution is placed in a 20.0 cm polarimeter tube. The observed deviation angle of rotation is 1,25° counter clockwise. Calculate the specific rotation of the sample.

3. (+)-Tartaric acid has a specific rotation of +12.0°. Calculate the specific rotation of a mixture of 68% (+)-tartaric acid and 32% (-)-tartaric acid. b 1.00 g of sample is dissolved in 20.0 mL of ethanol. Then 5.00 mL of this solution is placed in a 20.0 cm polarimeter tube. The observed deviation angle of rotation is 1,25° counter clockwise. Calculate the specific rotation of the sample.

Organic Chemistry

8th Edition

ISBN:9781305580350

Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Chapter3: Stereoisomerism And Chirality

Section3.7: Optical Activity—how Chirality Is Detected In The Laboratory

Problem 3.9P

See similar textbooks

Similar questions

When 0.066 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 20°C (using the D line of sodium) is -0.208°Calculate the specific rotation of cholesterol. specific rotation [a] = i eTextbook and Media
28. Calculate the specific rotation of the following compound taken at 25°C using the sodium D line: 1g of sample is dissolved in 20mL of ethanol, the measurement was carried out in 20-cm polarimeter tube, and the observed rotation was equal to 1.25° counterclockwise. A -12.5° 29 Pradios B -22.5° C +12.5° D -0.25° с E -122.5° D F-36.0° G -1.25⁰
Viktor measures out 2.100 g of the ibuprofen from the bottle and dissolves it in 15.0 mL of ethanol. He transfers this solution to a 1.0 dm long tube and the polarimeter gives him a reading of +7.3416 deg for this sample. The literature specific rotation for ibuprofen is 57 deg. What is the observed specific rotation for this sample? What is the enantiomeric excess (EE) for this sample?
(iii) Calculate the specific rotation of each enantiomer in a mixture containing 10 mL (0.10 M) of (2S, 3R, 5S) enantiomer and 30 mL (0.10 M) of (2R, 3S, 5R) enantiomer. Given the specific rotation of the mixture = +4.8°.
CH, CH, Q3: The specific rotation of L-alanine in water (at 25°C) is +2.8. A chemist prepared a mixture of L-alanine and its enantiomer, and 3.50 g of the mixture was dissolved in 10.0 mL of water. This solution was then placed in a sample cell with a pathlength of 10.0 cm and the observed rotation was +0.78. Calculate the % ee of the mixture.
When 0.018 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 degrees (Using the D line of sodium) is -0.0567 degrees. Calculate the specific rotation of cholesterol. specific rotation= [α] =
3. A solution of enantiomers has an observed specific rotation of +8.0°ml/g dm and pure (+) enantiomer has a specific rotation of +12'ml/g dm. Determine the optical purity and ratio of the enantiomers in the mixture.
1. What is the specific rotation of glucose(MW 180) with a density of 1.56g/mL and an angular rotation of +1.24° in a 1dm tube? 2. A 10.0% Atropine solution was analyzed using a polarimeter in a 2 dm tube, the reading from the polarimeter was +1.22° and the solvent alone is +1.20°, calculate its specific rotation. 3. An Aspirin solution was placed in an oven at 60°C. The absorbance was taken every month for 3 months. The kinetic profile equation is y= -0.0165x – 1.205. If Aspirin was manufactured November 26, 2021, what is its expiration date?
The specific rotation of L-dopa in water is -39.5. The specific rotation of a solution of L-dopa and its enantiomer was determined to be -19.75. Calculate the % ee of this mixture. Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a b с P e 15% 25% 50% 75% 80%
How can we decide whether an observed rotation of a solution of an optically active compound is +170° and not actually -190°?
The 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%
人工知能を使用せず、すべてを段階的にデジタル形式で解決してください。ありがとう SOLVE STEP BY STEP IN DIGITAL FORMAT DON'T USE CHATGPT 9.- It has been observed that a pure enantiomer has an optical rotation of -0.62⁰ measured in a 1 dm tube with a concentration of 0.4 g/10 mL. Calculate the specific rotation of this molecule.