1. Dr. VMV weighed out 1.02 g of menthol and dissolved it into 10.0 mL of absolute ethanol in a 10.0 mL volumetric flask. The optical rotation for this solution was obtained in a cell with a 50 mm optical path length, found to be -2.508°, using the Na D-line at 25.1 °C. What is the specific rotation?

1. Dr. VMV weighed out 1.02 g of menthol and dissolved it into 10.0 mL of absolute ethanol in a 10.0 mL volumetric flask. The optical rotation for this solution was obtained in a cell with a 50 mm optical path length, found to be -2.508°, using the Na D-line at 25.1 °C. What is the specific rotation?

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

A 1.25 g sample of coniine, the toxic extract of hemlock, was dissolved in ethanol and placed in a sample cell with a 5.00 cm pathlength. The observed rotation at the sodium D line was +1.21° and [a]pwas +19.4°. Calculate the volume of ethanol us dissolve the sample. O a. 5.0 mL O b. 10.0 mL O c. 20.0 mL O d. 15.0 mL Save Answer A 1.25 g sample of coniine, the toxic extract of hemlock, was dissolved in ethanol and placed in a sample cell with a 5.00 cm pathlength. The observed rotation at the sodium D line was +1.21° and [a]pwas +19.4°. Calculate the volume of ethanol us dissolve the sample. Oa. 5.0 mL Ob. 10.0 mL Oc. 20.0 mL O d. 15.0 mL Save Answer A 1.25 g sample of coniine, the toxic extract of hemlock, was dissolved in ethanol and placed in a sample cell with a 5.00 cm pathlength. The observed rotation at the sodium D line was +1.21° and [a]pwas +19.4°. Calculate the volume of ethanol us dissolve the sample. Oa. 5.0 mL O b. 10.0 mL O c. 20.0 mL O d. 15.0 mL Save Answer
An aqueous solution containing 4.87 g of an optically-pure compound was diluted to 8.00 x 102 mL with water and placed in a 15.0 cm long polarimeter tube. The measured rotation was -2.47° at 25° C. Calculate the specific rotation of the compound. [a]=
5. A solution containing 2.0g of compound dissolved in 50mL of solvent generated an observed rotation of plane-polarized light (A = 589.6nm) of 20° in a polarimeter tube 300mm long at a temperature of 25°C. What is the specific rotation of the compound?
Calculate the specific rotation of a solution of a compound (30.0 g/100 mL of solution) that has a measured rotation of +25.25º in a 2.00 dm tube.
The specific rotation of (R)-2-butanol is 13.5° counterclockwise. A sample containing (R)-2-butanol was made by dissolving 1.75 g into a solution with a total volume of 3.55 mL. The light source was a sodium D line and the temperature was 25° C. The length of the sample tube was 12.5 cm. What was the observed rotation of the sample? "Use three significant figures for your answer and the correct sign.
You dilute 1g of an orgainc liquid, with ethanol, to 10mL in a volumertic flask. This solution is analyzed using polarimerty (at 20oC), and an optical rotation of -6.8o is observed. Calculate the specific rotation of the oraginc liquid, if the sample cell that was used was 100mm.
A 1.50 g sample of coniine, the toxic extract of poison hemlock, was dissolved in 10.0 mL of ethanol and placed in a sample cell with a 5.00 cm pathlength. The observed rotation at the sodium D line was +1.21°. Calculate [a]p for coniine.
If we mix 20cm^3 sucrose of 250g/dm^3 mass concetration with 20cm^3 water, what will be the light rotation of the solution at 2dm light path. The specific rotation of sucrose is 66.5(° cm^3)/(gdm)
5. A solution of 1.1 g/mL of a pure R enantiomer in a 1.0 dm polarimeter rotates plane polarized light by +23.4°. What is the rotation observed on this solution in a 4 dm polarimeter?
A 23.9061 g of Ethambutol hydrochloride was diluted with 100 mL of water and was analyzed in a 1.0 dm polarimeter tube. What is the specific rotation if the observed rotation using a D-line sodium lamp at a 589 visible wavelength and at 25°C is +1.53°. Answer the following: Calculate for the specific rotation of the sample What is the monograph specification for the specific rotation of ethambutol? Disposition
One gram of ampicillin (C16H19N3O4S) MW 349 , was dissolved in 180 mL of water. Using 2 dm tube, this solution was found out to have an angular rotation of +2.83° and that of the solvent is +3.5°. Calculate the molar rotation.
3.5 mg of optically-enriched (-) sugar P was dissolved in 1.00 mL methanol in a 1.00 mL volumetric flask. The optical rotation was found to be -0.0222° in a 5.0 cm cell. What is the specific rotation? Write out all your work and upload it here.