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3. Pure Θ Kaylanoic acid has a specific rotation of-160° (same conditions and temperature as sample...
2. The optical activity, measured by specific rotation, of pure (R-malic acid is [a]20D-+27% What is...
2. The optical activity, measured by specific rotation, of pure (R-malic acid is [a]20D-+27% What is the specific rotation of a mixture of 50% and 50% of (R)-malic acid and (S)-malic acid? What is enantiomeric excess of a sample of malic acid containing both enantiomers that has a [al20D -0% [a]20D-27"; [a]20D-_ 13.5": [a]20D-+ 13.5°
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...
7a.) Enantiomerically pure xylose (shown below) has a specific rotation of approximately -21 Is t...
7a.) Enantiomerically pure xylose (shown below) has a specific rotation of approximately -21 Is the enantiome r shown below the D or the L form of xylose? How do you know? (3 points) e of xylose were made and it was found to have a specific rotation of-15°, what would be the enantiomeric excess of this sample (clearly show your working)? (3 points) What would be the stereoisomeric composition of the mixture (D/L)? (2 points) CHO но он HOH CH2OH...
7) A solution of an enantiomerically pure sample of (R)- 3-chloropentanoic acid is made by dissolving...
7) A solution of an enantiomerically pure sample of (R)- 3-chloropentanoic acid is made by dissolving 2.5 g of the compound in 100 mL of water. a. Calculate the specific rotation of (R)- 3-chloropentanoic acid if the observed rotation of the above sample is +2.78° when measured in a 40 cm tube. g/mL +2.7% = 127.5 10025(4) b. What is the specific rotation of (S)-3-chloropentanoic acid? -27,8 c. A chemist prepares a sample which is a mixture of both enantiomers...
ootical for pure substance is +40 1. As the new chemist working at "Drugs Us", you...
ootical for pure substance is +40
1. As the new chemist working at "Drugs Us", you are given the task of resolving racemic phenylethyl- amine into its individual enantiomers using (S)-malic acid as resolving agent. After you carried out the resolution, you labeled the products you isolated "Sample A" and "Sample B. You subjected both samples to polarimetry ( = 589 nm (sodium D-line), 1-dm cell) and obtained the following results. Sample A: 1.00 g dissolved in 10.0 mL methanol...
Please help with pre-lab questions. Pre-Lab Questions: 1. A sample of 2-butanol has a specific rotation...
Please help with pre-lab questions.
Pre-Lab Questions: 1. A sample of 2-butanol has a specific rotation of +3.25. Determine the optical purity (%ee) and percent composition of this sample (see Mohrig section 17.4). The specific rotation of pure (+)-2-butanol is +13.0°. 2. The equation for the formation of the diastereomeric salts is shown in the background information (performed in Part A of the procedure). Write this chemical equation in your notebook, then ALSO write a balanced equation for the formation...
Help please!! 14. (5) Pure (R)-mandelic acid has a specific rotation of -154. If a sample...
Help please!!
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?
2. The optical activity, measured by specific rotation, of pure (R-malic acid is [a]20D-+27% What is the specific rotation of a mixture of 50% and 50% of (R)-malic acid and (S)-malic acid? What is enantiomeric excess of a sample of malic acid containing both enantiomers that has a [al20D -0% [a]20D-27"; [a]20D-_ 13.5": [a]20D-+ 13.5°
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...
7a.) Enantiomerically pure xylose (shown below) has a specific rotation of approximately -21 Is the enantiome r shown below the D or the L form of xylose? How do you know? (3 points) e of xylose were made and it was found to have a specific rotation of-15°, what would be the enantiomeric excess of this sample (clearly show your working)? (3 points) What would be the stereoisomeric composition of the mixture (D/L)? (2 points) CHO но он HOH CH2OH...
7) A solution of an enantiomerically pure sample of (R)- 3-chloropentanoic acid is made by dissolving 2.5 g of the compound in 100 mL of water. a. Calculate the specific rotation of (R)- 3-chloropentanoic acid if the observed rotation of the above sample is +2.78° when measured in a 40 cm tube. g/mL +2.7% = 127.5 10025(4) b. What is the specific rotation of (S)-3-chloropentanoic acid? -27,8 c. A chemist prepares a sample which is a mixture of both enantiomers...
ootical for pure substance is +40
1. As the new chemist working at "Drugs Us", you are given the task of resolving racemic phenylethyl- amine into its individual enantiomers using (S)-malic acid as resolving agent. After you carried out the resolution, you labeled the products you isolated "Sample A" and "Sample B. You subjected both samples to polarimetry ( = 589 nm (sodium D-line), 1-dm cell) and obtained the following results. Sample A: 1.00 g dissolved in 10.0 mL methanol...
Please help with pre-lab questions.
Pre-Lab Questions: 1. A sample of 2-butanol has a specific rotation of +3.25. Determine the optical purity (%ee) and percent composition of this sample (see Mohrig section 17.4). The specific rotation of pure (+)-2-butanol is +13.0°. 2. The equation for the formation of the diastereomeric salts is shown in the background information (performed in Part A of the procedure). Write this chemical equation in your notebook, then ALSO write a balanced equation for the formation...
Help please!!
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?
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