If you did not get a 100% pure sample of (+)-phenylsuccinic acid from this polarimetry experiment, how might you go abou...
If you did not get a 100% pure sample of (+)-phenylsuccinic acid from this polarimetry experiment, how might you go about increasing the purity of it?
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If you did not get a 100% pure sample of (+)-phenylsuccinic acid from this polarimetry experiment, how might you go abou...
Experiment: Lab goals Isolate an enantiopure sample of phenylsuccinic acid from a racemic mixture Assess the...
Experiment:
Lab goals
Isolate an enantiopure sample of phenylsuccinic acid from a
racemic mixture
Assess the enantiopurity of the recovered material using
polarimetry experiment
Procedure
1. Selectively preiciptate the (+) enantiomer of phenylsuccinic
acid using L(–) proline resolving agent
2. Remove the (–) proline (resolving agent) from the
precipitate by washing with acid solution (HCl)
3. Determine the enantiomeric excess of (+)-phenylsuccinic acid
in the precipitate using polarimetry
4. Collect your enantiomerically enriched product in the
(+)-phenylsuccinic acid container
If...
8. Polarimetry data a. A student took 0.375 g of the product, (S)-phenylsuccinic acid, and dissolved...
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...
Standardization of NaOH solution experiment: A 0.75 g sample of pure acid KHP was titrated to...
Standardization of NaOH solution experiment: A 0.75 g sample of pure acid KHP was titrated to phenolphthalein endpoint using 45.34 ml NaOH of unknown concentration. The formula weight of pure KHP is 204.22g/mol. Write the chemical equation for the neutralization reaction, indicate the color change of the indicator at the endpoint, and calculate molarity of the NaOH solution. Show your work. 1. Chemical equation ------------- 2. Endpoint color change ---- 3. NaOH molarity --------- Determine percent purity of impure KHP...
1. If given a piece of "pure gold" jewelry, explain how you might determine if the...
1. If given a piece of "pure gold" jewelry, explain how you might determine if the piece is made of pure gold or not. 2. Acetone, a common solvent, has a density of 0.79 g/mL at 20˚C. What is the volume of 100.g of acetone at 20˚C? 3. If a sample has an experimental refractive index of 1.4285 at 25.0 C, what is its refractive index at 20.0 C? 4. As the density of a liquid medium increases, would you expect...
you travel 50 mph at a constant velocity for 120 min, how far did you go?...
you travel 50 mph at a constant velocity for 120 min, how far did you go? I know it’s 100 miles, but how do I get that answer?
1. How did the melting point of your acetanilide change after recrystallization? 2. Why would you...
1. How did the melting point of your acetanilide change after recrystallization? 2. Why would you test the purity of your acetanilide by mixing it with a known, pure sample of acetanilide and rechecking the m.p.?
what does the IR reading of your experiment tell you about the product? Did the experiment...
what does the IR reading of your experiment tell you about the
product? Did the experiment go to completion? how can you
tell?
the
chemical used for IR was salycylic acid
this is the given scheme/reaction
Thu 094 31 10 10 30 40 2019 JUUUUU 161032 1660.51 - 1480.47 01 4000 2500 2000 Wavenumbers WinFIRST Report Name: Experiment: BB Chemical Salycylic Acid 10/24/19 We NaOH OH +CH3OH Saponification of Methyl Salicylate excess) A ochz blev cesta OH H₂O OH methyl...
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...
Experiment 2: Synthesis of Aspirin (Acetylsalicylic Acid ) 1. How many moles of salicylic acid are...
Experiment 2: Synthesis of Aspirin (Acetylsalicylic Acid ) 1. How many moles of salicylic acid are there in 1.0 grams of salicylic acid? 2. How many moles of acetic anhydride are there in 3 mL of acetic anhydride? 3. When 1.0g of salicylic acid and 3 mL of acetic anhydride react, DETERMINE which one is the limiting reactant (you can go to General Chemistry if you need help about limiting reagent)? 4. What is phosphoric acid used for in the...
2. How might you modify this experiment to find out whether the presence of duds did...
2. How might you modify this experiment to find out whether the presence of duds did or did not make a difference in your calculation? in 1915Win99799 el som b olov 1921 mooqon lo b all 3. Why is it a good idea to store popcorn kernels in the refrigerator? TOYONS gnilsod 90sd lots of deb y oqevo lo 4. As freshly popped popcorn cools, it absorbs moisture from the air and thus gains mass. Knowing this, would you say...
Experiment:
Lab goals
Isolate an enantiopure sample of phenylsuccinic acid from a
racemic mixture
Assess the enantiopurity of the recovered material using
polarimetry experiment
Procedure
1. Selectively preiciptate the (+) enantiomer of phenylsuccinic
acid using L(–) proline resolving agent
2. Remove the (–) proline (resolving agent) from the
precipitate by washing with acid solution (HCl)
3. Determine the enantiomeric excess of (+)-phenylsuccinic acid
in the precipitate using polarimetry
4. Collect your enantiomerically enriched product in the
(+)-phenylsuccinic acid container
If...
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...
Standardization of NaOH solution experiment: A 0.75 g sample of pure acid KHP was titrated to phenolphthalein endpoint using 45.34 ml NaOH of unknown concentration. The formula weight of pure KHP is 204.22g/mol. Write the chemical equation for the neutralization reaction, indicate the color change of the indicator at the endpoint, and calculate molarity of the NaOH solution. Show your work. 1. Chemical equation ------------- 2. Endpoint color change ---- 3. NaOH molarity --------- Determine percent purity of impure KHP...
what does the IR reading of your experiment tell you about the
product? Did the experiment go to completion? how can you
tell?
the
chemical used for IR was salycylic acid
this is the given scheme/reaction
Thu 094 31 10 10 30 40 2019 JUUUUU 161032 1660.51 - 1480.47 01 4000 2500 2000 Wavenumbers WinFIRST Report Name: Experiment: BB Chemical Salycylic Acid 10/24/19 We NaOH OH +CH3OH Saponification of Methyl Salicylate excess) A ochz blev cesta OH H₂O OH methyl...
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...
2. How might you modify this experiment to find out whether the presence of duds did or did not make a difference in your calculation? in 1915Win99799 el som b olov 1921 mooqon lo b all 3. Why is it a good idea to store popcorn kernels in the refrigerator? TOYONS gnilsod 90sd lots of deb y oqevo lo 4. As freshly popped popcorn cools, it absorbs moisture from the air and thus gains mass. Knowing this, would you say...
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