Homework Answers
Extraction is technique were more extraction with small amount of solvents will give more yield as distribution coefficient says more extraction with small amount of solvent gives you more distribution.
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Part A 1. If you had used more methylene chloride in each step, you could have...
If each bag of Lipton black tea contains 55 mg of caffeine, what is the maximum...
If each bag of Lipton black tea contains 55 mg of caffeine, what is the maximum amount of caffeine that you could extract from one using our procedure? Assume one bag and 40mL of tea-water at the end of initial solid-liquid extraction. The partition coefficient (K) for caffeine in methylene chloride is 7.2. How much caffeine could be extracted using our procedure if we had used ethyl acetate (K = 2.0) instead of methylene chloride? Explain why the amount does...
Use of Extraction to Isolate a Neutral Compound from a Mixture Containing an Acid or Base...
Use
of Extraction to Isolate a Neutral Compound from a Mixture
Containing an Acid or Base Impurity.
Part 4D
Hi guys I had a question about this lab. I am not sure how to
create a flow chart for it as well as what chemical equations it
needs. please let me know if you need more information.
layer. In the Optional Exercise, the sample contains a neutrum base impurity; however, a detailed procedure is not given. If you are assigned...
QUESTION: Write a flow scheme for the work-up. THE WORK UP:
QUESTION:
Write a flow scheme for the work-up.
THE WORK UP:
C. Work-up (save all layers) and Isolation of Product MgBrCl Benzoic acid Transfer the mixture into a test tube. Rinse the beaker with about 3 mL of regular (not anhydrous) diethyl ether and pour the washings into the test tube. There should be two distinct layers in the test tube Remove the aqueous layer (to be discarded) and shake the ether layer with about 2 mL of 3 M...
Refer to the assigned procedure and verify that an excess of NaBH4 is to be used for these reacti...
Refer to the assigned procedure and verify that an excess of NaBH4
is to be used for these reactions. Explain using calculations.
We were unable to transcribe this imageAdd 2 mL of water. Heat the solution briefly to boiling. The solution should be clear and colorless. Transfer the clear, warm solution to a centrifuge tube using a filter pipet and allow to cool to room temperature. Add 4 mL of methylene chloride. Swirl and shake to mix the layers. Transfer...
in FRIEDEL-CRAFTS ACYLATION AND COLUMN CHROMATOGRAPHY lab (2 pts) Amount of acetyl chloride used ____4______(drops) (each...
in FRIEDEL-CRAFTS ACYLATION AND COLUMN CHROMATOGRAPHY lab
(2 pts) Amount of acetyl chloride used ____4______(drops) (each
drop is 0.01 mL) _____2______(equivalents) Based on the amount of
ferrocene you began the Friedel-Crafts reaction with, determine the
percent yield of acetylferrocene, diacetylferrocene, and the
percent recovery of unreacted ferrocene (show work)
react by 0.100 g of ferrocene at beginning
got 0 g of ferrocene, 0.012g of diacetylferrocene , 0.017g of
acetylferrocene
REACTION PROCEDURE: To a 5 mL conical vial, add a spin...
SYNTHESIS OF T-PENTYL CHLORIDE LAB Provide a stoichiometry table for the reaction being performed in this...
SYNTHESIS OF T-PENTYL CHLORIDE LAB
Provide a stoichiometry table for the reaction being performed
in this lab.
PROCEDURE Preparation oft-Pentyl Chloride In a 125-mL separatory funnel, place 10.0 mL of tert-pentyl alcohol (2-methyl-2- butanol, MW = 88.2, d = 0.805 g/mL) and 25 mL of concentrated hydrochloric acid (d 1.18 g/mL). Do not stopper the funnel. Gently swirl the mixture in the separa- tory funnel for about 1 minute. After this period of swirling, stopper the separatory funnel and carefully...
Would the methylene chloride layer be above or below the experiment? Justify your answer. 1. aqueous layer in today...
Would the methylene chloride layer be above or below the experiment? Justify your answer. 1. aqueous layer in today's ium carbonate used in the isolation of caffeine? Be specific as to the 2. Why is potass chemical species the carbonate may act on. Why was sodium sulfate used? 3. 4. After introducing 1.0 g of potassium carbonate into the centri hot water extract, it was capped, shaken, and then cooled to room temperature. Following this, roug minute. Why wasn't the...
(If you need any more information just let me know) Determine the limiting reagent for the...
(If you need any more information just let me know) Determine the limiting reagent for the preparation of 2-bromo-2-methylbutane and calculate the theoretical yield of product. 1 CHEM-2223 Organic Chemistry Laboratory I Exp. 7: Synthesis of 2-chloro-2-methylbutane In this reaction a tertiary alcohol, 2-methyl-2-butanol, is converted to a tertiary halide, 2-chloro- 2-methylbutane through a SN1 reaction. 1) Chemicals 2-Methyl-2-butanol Hydrochloric acid, HCl (12 M) Saturated sodium bicarbonate Saturated sodium chloride (380 g/L) Anhydrous sodium sulfate...
Based on solubility, density, and polarity information what will happen if a caffeine extraction and sublimation...
Based on solubility, density, and polarity information what will happen if a caffeine extraction and sublimation experiment is carried out at 100°C? (Note: show the outline, the experiment might not work perfectly in the actual lab, but a hypothetical outline is needed). Procedure below: Boil 20mL DI water. Place 1st tea bag in beaker taken off heat and cool to handling temperature. Squeeze tea from bag without breaking it. Boil the mixture. Repeat steps with 2nd teabag. Cool to room...
using the procedures, we used dichloromethane as the unknown mixture and i was able to extract...
using the procedures, we used dichloromethane as the unknown
mixture and i was able to extract benzoic acid for an acid,
5-chloro-2-methoxyanaline for a base compound and biphenyl for
neutral compound.
i don't know if that answers the missing part but if it didn't
could you be specific please? thank you!
2. Construct a flow chart of the acid-base extraction you carried out. Use the specific structure of the compounds isolated. Don't use the molecular formula. (15 pts) We used...
Use
of Extraction to Isolate a Neutral Compound from a Mixture
Containing an Acid or Base Impurity.
Part 4D
Hi guys I had a question about this lab. I am not sure how to
create a flow chart for it as well as what chemical equations it
needs. please let me know if you need more information.
layer. In the Optional Exercise, the sample contains a neutrum base impurity; however, a detailed procedure is not given. If you are assigned...
QUESTION:
Write a flow scheme for the work-up.
THE WORK UP:
C. Work-up (save all layers) and Isolation of Product MgBrCl Benzoic acid Transfer the mixture into a test tube. Rinse the beaker with about 3 mL of regular (not anhydrous) diethyl ether and pour the washings into the test tube. There should be two distinct layers in the test tube Remove the aqueous layer (to be discarded) and shake the ether layer with about 2 mL of 3 M...
Refer to the assigned procedure and verify that an excess of NaBH4
is to be used for these reactions. Explain using calculations.
We were unable to transcribe this imageAdd 2 mL of water. Heat the solution briefly to boiling. The solution should be clear and colorless. Transfer the clear, warm solution to a centrifuge tube using a filter pipet and allow to cool to room temperature. Add 4 mL of methylene chloride. Swirl and shake to mix the layers. Transfer...
in FRIEDEL-CRAFTS ACYLATION AND COLUMN CHROMATOGRAPHY lab
(2 pts) Amount of acetyl chloride used ____4______(drops) (each
drop is 0.01 mL) _____2______(equivalents) Based on the amount of
ferrocene you began the Friedel-Crafts reaction with, determine the
percent yield of acetylferrocene, diacetylferrocene, and the
percent recovery of unreacted ferrocene (show work)
react by 0.100 g of ferrocene at beginning
got 0 g of ferrocene, 0.012g of diacetylferrocene , 0.017g of
acetylferrocene
REACTION PROCEDURE: To a 5 mL conical vial, add a spin...
SYNTHESIS OF T-PENTYL CHLORIDE LAB
Provide a stoichiometry table for the reaction being performed
in this lab.
PROCEDURE Preparation oft-Pentyl Chloride In a 125-mL separatory funnel, place 10.0 mL of tert-pentyl alcohol (2-methyl-2- butanol, MW = 88.2, d = 0.805 g/mL) and 25 mL of concentrated hydrochloric acid (d 1.18 g/mL). Do not stopper the funnel. Gently swirl the mixture in the separa- tory funnel for about 1 minute. After this period of swirling, stopper the separatory funnel and carefully...
Would the methylene chloride layer be above or below the experiment? Justify your answer. 1. aqueous layer in today's ium carbonate used in the isolation of caffeine? Be specific as to the 2. Why is potass chemical species the carbonate may act on. Why was sodium sulfate used? 3. 4. After introducing 1.0 g of potassium carbonate into the centri hot water extract, it was capped, shaken, and then cooled to room temperature. Following this, roug minute. Why wasn't the...
using the procedures, we used dichloromethane as the unknown
mixture and i was able to extract benzoic acid for an acid,
5-chloro-2-methoxyanaline for a base compound and biphenyl for
neutral compound.
i don't know if that answers the missing part but if it didn't
could you be specific please? thank you!
2. Construct a flow chart of the acid-base extraction you carried out. Use the specific structure of the compounds isolated. Don't use the molecular formula. (15 pts) We used...
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