Understanding the optical rotation that we observe in lab is not the same as the specificrotation commonly reported in the literature; a student sets out to explore this on theirown. They prepare a 0.083 g/mL sucrose solution, pour it into a 1 dm long optical cell, andmeasure the optical rotation of this solution to be 5.5 degrees. Use Biot's law to determinethe specific rotation of sucrose and then the percent difference in compare thisexperimentally determined value against the accepted value provided above.Biot's law stateswwwαπ[a]lcwhere a is the observed optical rotation in units of degrees, 1 is the length of the cell inunits of decimeters (dm), c is the sample concentration in units of grams per milliliter(g/mL), and [a] is the specific rotation in units of degrees (the formal unit for specificrotation is degrees divided by dmg/mL, but scientific literature uses just degrees).Percent difference =|Experimental value-Accepted value|Accepted value× 100% Compound nameD-SucroseD-Lactose[a] 20 [deg dm-1 cm³ g-1]+66.37+52.3Camphor+44.26Cholesterol-31.5

here we need to use biot's lawgiven: α= 5.5 l= 1dm c= 0.083 g/ml experimental specific rotation =…

Answered: Understanding the optical rotation that…

EBK A SMALL SCALE APPROACH TO ORGANIC L

4th Edition

ISBN:9781305446021

Author:Lampman

Publisher:Lampman

Chapter92: Polarimetry

Section: Chapter Questions

Problem 2P

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2. The observed rotation of a compound, X (14.0g dissolved in water to make 100ml. of solution) in a polarimeter tube of length 30cm is +10.5°. What is the specific rotation of X?
A solution o 150.0 mL of solvent. A portion of the solution was placed in a tube that is 1.00 dm long. chiral compound was prepared by dissolving 25.42 g in What is its specific rotation of light if the observed rotation was determined experimentally to be 15.00°? pinepdf (31).pdf Type here to search
The specific rotation, [a]p, for (-)-2-butanol is +14. What is the observed rotation for a solution of 1.0 g of (-)-2-butanol in 10 mL of water in a sample tube having a pathlength of 10 cm? 1.4 degrees . The observed rotation of a solution of 1.1 g of a compound in 10 mL of water is -10 degrees. If the pathlength is 10 cm, what is the specific rotation of the compound?
1. 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.
What is plane of symmetry and axis of symmetry?
Sucrose is a chiral compound, and enantio-pure sucrose has specific rotation [?]? 20 = +66.5°. A sample of synthesized sucrose from the organic chemistry lab was tested, and the specific rotation of the sample is [?]? 20 = +60.1°. a) Determine the enantiomeric excess (ee) of the sample b) Calculate the ratio of two enantiomers c) Draw the structure of the minor enantiomer in the sample
Photos OneDrive 4 Crop & rotate F Filters Adjustments 2 Undo all C Redo all Crop & rotate Straightening 0 ° 8. The structure of the compound is shown below was found to be biologically active. Answer the following questions pertaining to the structure below: Rotate A Flip CH3 HN O. Aspect ratio : Custom LCH H2C. Reset `CH3 a. Indicate two electrophilic sites(el) in the structure (d)Identify any/all chiral center(s) with an * in the structire (e) Draw a pair of diasteriomers of the compound below. What is the relationship between the two compounds that you drew? Are they enantiomers or diasteriomers of each other Save a copy Cancel 5:20 PM O Type here to search ENG 12/20/2021 IU
Explain the term "barrier to rotation" ?
The specific rotation, [a]p, for (-)-malic acid is -27. What is the observed rotation for a solution of 1.2 g of (-)-malic acid in 10 mL of water in a sample tube having a pathlength of 10 cm? | degrees. The observed rotation of a solution of 1.2 g of a compound in 10 mL of water is +0.75 degrees. If the pathlength is 10 cm, what is the specific rotation of the compound? 9 more group attempts remaining Submit Answer Retry Entire Group
What do you mean by Specific Rotation ?
For the R enantiomer of the molecule, the specific optical rotation is : [a]=+92°.g1.cm³.dm1 A solution containing a mixture of the 2 enantiomers, with a concentration of 0.1 g.cm3, is placed in a 10 cm tank and is analyzed in a polarimeter. The angle of deviation read is -5.52°. Using Biot's law, give the percentage of R enantiomer contained in this mixture. (result in percent, example answer 76)
The specific rotation, [a]p, for (-)-2-butanol is +14. What is the observed rotation for a solution of 3.3 g of (-)-2-butanol in 10 mL of water in a sample tube having a pathlength of 10 cm? degrees . The observed rotation of a solution of 0.75 g of a compound in 10 mL of water is -6.9 degrees. If the pathlength is 10 cm, what is the specific rotation of the compound?

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