the optical rotation of the d-form of -piene (C10H16), measured at 20 C with the sodium...
the optical rotation of the d-form of 
-piene (C10H16), measured at 20 C with the sodium D-line in a cell
of pathlength 1.0 cm is +4.4 degrees. Given that the density of the
liquid is 0.859 g mL^{-1}, calculate the specific rotation of
-piene. What does the + sign of the rotation mean?
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the optical rotation of the d-form of
-piene (C10H16), measured at 20 C with the sodium...
The specific rotation [α] of (1S, 2R)-ephedrine HCl salt in water is −32.5° at 22 °C (light source: sodium D line). What is the optical rotation α in degrees (°) of an aqueous solution containing 250...
The specific rotation [α] of (1S, 2R)-ephedrine HCl salt in water is −32.5° at 22 °C (light source: sodium D line). What is the optical rotation α in degrees (°) of an aqueous solution containing 250 mg/mL (1R, 2S)-ephedrine HCl salt AND 50 mg/mL (1S, 2R)-ephedrine HCl salt measured using a 1.00-cm pathlength tube under the same condition?
The specific rotation, [a]D, for (-)-pseudoephedrine is-52. What is the observed rotation for a solution of...
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...
5.56 The specific rotation of vitamin C (using the D line of sodium, at 20°C) is +24 g the D line of sodium, at 20°...
5.56 The specific rotation of vitamin C (using the D line of sodium, at 20°C) is +24 g the D line of sodium, at 20°C) is +24. Predict what the on would be for a solution containing 0.100 g of vitamin C dissolved in of ethanol and placed in a sample cell with a length of 1.00 dm.
repared a limonene sample with a concentration of 0.044 g/mL and measured an optical rotation of a=8.78 degrees usi...
repared a limonene sample with a concentration of 0.044 g/mL and measured an optical rotation of a=8.78 degrees using a 20 cm polarimeter tube. Calculate the specific rotation () of the students limonene sample and write your answer in the box. (review Example 1 in the procedure for how to do this) 6. If a mixture of (R) and (S)-Limonene Acid gives a %ee of 80.35% favoring the R enantiomer, use this to calculate the ratio of R to S...
Draw a structural formula of the S configuration of the compound shown below. The specific rotation,...
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...
optical activity problems.. please show all steps i dont understand You have a sample (Sample X)...
optical activity problems.. please show all steps i dont
understand
You have a sample (Sample X) which is a mixture of +/- Carvone. The solution was made by dissolving 4.50 g of the sample in enough methanol to bring the volume of solution to 10,0 ml. Some of the solution is placed in a 100 cm polarimeter cell and its optical rotation is measured at 25°C using light of the sodium D line wavelength (589.6 nm). The observed rotation is...
11 degrees at 10cm rotation of sucrose is 1 C=.171 Tength of the light path, and...
11 degrees at 10cm
rotation of sucrose is 1
C=.171
Tength of the light path, and the wavelength of the A standard formula is used to convert observed into "specific rotations" Tal a physical property tl be found in tables of physical properties of chemical compounds. al- 0 - measured rotation in angular degrees c = concentration in grams per milliliter of solution = cell length in decimeters D = wavelength of light, usually the D* line of a sodium...
4. a) 7.00 mg sample dissolved in 1.00ml solvent and solution was placed in a cell...
4. a) 7.00 mg sample dissolved in 1.00ml solvent and solution was placed in a cell with 2.00 cm pathlength, an observed rotation of +0.08 was found. Calculate [a ]p for sample. b) A sample with a concentration of 0.3 g/mL was placed in a cell with a length of 5 cm. The resulting rotation at the sodium D line was t1.52°. What is the [a]D?
25T 8. Answer the following problems with explanation. The specific rotation [a]D of natural epinephrine (adrenaline)...
25T 8. Answer the following problems with explanation. The specific rotation [a]D of natural epinephrine (adrenaline) in water is-50°. Assume that all measurements are made in 10 cm polarimeter sample containers at 25 C. (a) To determine the optical purity ofa synthetic epinephrine, you prepare a 10 mL water solution containing 1.0 g of the synthetic product, measure the optical rotation, and get a reading of-2.5° What is the optical purity of the synthetic adrenaline? (c) What are the percentages...
14.A solution of 2.0 g of (+) glyceraldehydes, in a 10 ml of water was placed in a mm cell. Using the sodium D line,...
14.A solution of 2.0 g of (+) glyceraldehydes, in a 10 ml of water was placed in a mm cell. Using the sodium D line, a rotation of +1.74 was found at 25C. Determine the specific rotation of(+) glyceraldehydes? (5) 15.(+)-Tartaric acid has a specific rotation of +12.0°. Calculate the specific rotation of a mixture 1 of 68% (+)-tartaric acid and 32% (-)-tartaric acid? (5)
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...
5.56 The specific rotation of vitamin C (using the D line of sodium, at 20°C) is +24 g the D line of sodium, at 20°C) is +24. Predict what the on would be for a solution containing 0.100 g of vitamin C dissolved in of ethanol and placed in a sample cell with a length of 1.00 dm.
repared a limonene sample with a concentration of 0.044 g/mL and measured an optical rotation of a=8.78 degrees using a 20 cm polarimeter tube. Calculate the specific rotation () of the students limonene sample and write your answer in the box. (review Example 1 in the procedure for how to do this) 6. If a mixture of (R) and (S)-Limonene Acid gives a %ee of 80.35% favoring the R enantiomer, use this to calculate the ratio of R to S...
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...
optical activity problems.. please show all steps i dont
understand
You have a sample (Sample X) which is a mixture of +/- Carvone. The solution was made by dissolving 4.50 g of the sample in enough methanol to bring the volume of solution to 10,0 ml. Some of the solution is placed in a 100 cm polarimeter cell and its optical rotation is measured at 25°C using light of the sodium D line wavelength (589.6 nm). The observed rotation is...
11 degrees at 10cm
rotation of sucrose is 1
C=.171
Tength of the light path, and the wavelength of the A standard formula is used to convert observed into "specific rotations" Tal a physical property tl be found in tables of physical properties of chemical compounds. al- 0 - measured rotation in angular degrees c = concentration in grams per milliliter of solution = cell length in decimeters D = wavelength of light, usually the D* line of a sodium...
4. a) 7.00 mg sample dissolved in 1.00ml solvent and solution was placed in a cell with 2.00 cm pathlength, an observed rotation of +0.08 was found. Calculate [a ]p for sample. b) A sample with a concentration of 0.3 g/mL was placed in a cell with a length of 5 cm. The resulting rotation at the sodium D line was t1.52°. What is the [a]D?
25T 8. Answer the following problems with explanation. The specific rotation [a]D of natural epinephrine (adrenaline) in water is-50°. Assume that all measurements are made in 10 cm polarimeter sample containers at 25 C. (a) To determine the optical purity ofa synthetic epinephrine, you prepare a 10 mL water solution containing 1.0 g of the synthetic product, measure the optical rotation, and get a reading of-2.5° What is the optical purity of the synthetic adrenaline? (c) What are the percentages...
14.A solution of 2.0 g of (+) glyceraldehydes, in a 10 ml of water was placed in a mm cell. Using the sodium D line, a rotation of +1.74 was found at 25C. Determine the specific rotation of(+) glyceraldehydes? (5) 15.(+)-Tartaric acid has a specific rotation of +12.0°. Calculate the specific rotation of a mixture 1 of 68% (+)-tartaric acid and 32% (-)-tartaric acid? (5)
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