[X] = X/Cl
[x] = specific rotation = -158.0 degrees
x = optical rotation = -150.1 degrees
C = concentration in g/ml = ?
l = length of the sample tube = 2.5 dm
-158 = -150.1/(2.5*C)
C = 0.38 g/ml
1) (S)(-) mandelic acid has a specific rotation of -158.0 degrees, If the rotation you observed...
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14. (5) Pure (R)-mandelic acid has a specific rotation of -154. If a sample contains 60% of the R isomer and 40 % of its enantiomer, what is the c of this solution if the sample is run in a 15.0 cm solutions cell at a concentration of 0.125 g/mL?
Part A 50% (-)-mandelic acid and 50% (+-mandelic acid Express your answer using two significant figures. (4)-Mandelic acid has a specific rotation of +158. What would be the observed specific rotation of each of the following mbxtures? Part A 50% (-)-mandelic acid and 50% (+-mandelic acid Express your answer using two significant figures. observed specific rotation = 0 sube Previous Answers Correct Part B 10% (--mandelic acid and 90 % ( + ) - mandelic acid Express your answer using...
a. In this equation for specific rotation of a solution: a is the observed rotation in degrees, is the path length in decimetres, c is the concentration in g mL-1, Tis the temperature at which the measurement was taken in °C, and A is the wavelength in nanometres. You used variable path lengths for the polarised light (589 nm) to pass through, and you obtained the fol solutions (A, B, C, D and E) at variable concentrations. observed rotation data...
The specific rotation, (a)p, for (+)-alanine is +8.5. What is the observed rotation for a solution of 1.7 g of (+)-alanine in 10 mL of water in a sample tube having a pathlength of 10 cm? degrees The observed rotation of a solution of 1.3 g of a compound in 10 mL of water is +8.2 degrees. If the pathlength is 10 cm, what is the specific rotation of the compound? The specific rotation, (a)p, for(-)-pseudoephedrine is - 52. What...
8. Polarimetry data a. A student took 0.375 g of the product, (S)-phenylsuccinic acid, and dissolved it in 9.8 mL of acetone. This solution was placed in the observation tube and then the observed rotation was determined. The observed rotation, lobs, was 5.433 i. Given the observed rotation and the pathlength of the polarimeter cell (1 dm), calculate the specific rotation, (a). (1 point) ii. With your answer from 8i, calculate the enantiomeric excess, %ee. Optically pure (5)-(+)-phenylsuccinic acid is...
The specific rotation, [a]D, for (-)-pseudoephedrine is-52. What is the observed rotation for a solution of 0.50 g of (-)- pseudoephedrine in 10 mL of water in a sample tube having a pathlength of 10 cm? degrees The observed rotation of a solution of 1.7 g of a compound in 10 mL of water is +13 degrees. If the pathlength is 10 cm, what is the specific rotation of the compound? Submit Answer Retry Entire Group No more group attempts...
Draw a structural formula of the S
configuration of the compound shown below.
The specific rotation, [α]D, for (-)-malic
acid is -27. What is the observed
rotation for a solution of 0.50 g of
(-)-malic acid in 10 mL of water in a sample tube
having a pathlength of 10 cm?
The observed rotation of a solution of 0.75 g
of a compound in 10 mL of water is -4.6 degrees.
If the pathlength is 10 cm, what is the...
(+)-camphor has a specific rotation of +44. if you have a mixture of 34% (+)-camphor and 66% (-)-camphor, what will be the observed rotation of this mixture? Assume 1 g dissolved in 1 mL; the sample cell is 1 dm long
explain please
(*)-Camphor has a specific rotation of +44 degree. If you have a mixture of 34% (+)-camphor and 66% (-)-camphor, what will be the observed rotation of this mixture? Assume 1 g dissolved in 1 mL; the sample cell is 1 dm long. Express your answer in a whole number. The units are provided.
A 0.110 M solution of an enantiomerically pure chiral compound D has an observed rotation of +0.24° in a 1-dm sample container. The molar mass of the compound is 144.0 g/mol. (a) What is the specific rotation of D? (b) What is the observed rotation if this solution is mixed with an equal volume of a solution that is 0.110 M in L, the enantiomer of D? Number deg mL Number g dm deg (c) What is the observed rotation...