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.

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.

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

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]=
Calculate the specific rotations of the following samples taken at 25 °C using the sodium D line.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 rotation is 1.25° counterclockwise.
If a solution of a compound (50.0 g/100 mL of solution) has a measured rotation of +15° in a 2 dm tube, the specific rotation is: * +20 +35 O+15 O +8 O O O O
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
A sample of pure (S)-2-butanol was placed in a polarimeter tube with a 20 cm path length. Using the D-line of a sodium lamp, the observed rotation at 23 °C was a = +104°. The density of this compound is 0.756 g mL-1. What is the specific rotation of (R)-2-butanol?
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?
Predict the observed rotation for a 0.100 M aqueous solution of L-tartaric acid measured in a 1.0 dm polarimeter tube at 20 oC. The specific rotation of L-tartaric acid is +2.17 and the molecular mass is 150.09 g/mol.
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.
Calculate the specific rotation of (2R,3R)-tartaric acid based on the following observation: A 0.856 g sample of the pure acid was diluted to 10.0 mL with water and placed in a 1.00 dm polarimeter tube. The observed rotation using the 589 nm line of a sodium lamp at 20.0 oC was α = +1.06o.
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.
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.
The optical rotation of a sample was found to be 0.24° when the concentration was 0.60 g in 10 mL of chloroform and the path length of the cell in the polarimeter was 5 cm. What is the specific rotation for this sample?