The distribution coefficient for a compound are: Benzene-water; KD= 5.5 Petroleum ether-water; KD= 5.0 Methylene chloride-water;...
- The distribution coefficient for a compound are:
- Benzene-water; KD= 5.5
- Petroleum ether-water; KD= 5.0
- Methylene chloride-water; KD= 1.0
Which is the best choice of solvent for extracting the compound from an aqueous reaction mixture? Explain your answer.
Homework Answers
Distribution coefficient is the ratio of amount of compound in two immiscible phases. Since benzene-water solvent has high distribution coefficient thus, compound is dissolve in one phase more than in another phase. Hence, benzene-water solvent is best choice.
Add Answer to:
The distribution coefficient for a compound
are:
Benzene-water; KD= 5.5
Petroleum ether-water; KD= 5.0
Methylene chloride-water;...
The distribution coefficient between methylene chloride and water for solute Y is 9. An amount of...
The distribution coefficient between methylene chloride and water for solute Y is 9. An amount of 125.0.0 g of Y is dissolved in 160 mL of water. a) What weight of Y would be removed from water with a single extraction with 160-mL of methylene chloride? Report to 1 decimal place. b) What weight of Y would be removed from water (the original solution with the original amount) with two successive extractions with 80-mL portions each of methylene chloride? Report...
K2CO3 1.5 H20 Br он heat 2,3-dibromocinnamic acid trans-1-bromo-2-phenylethene Compound MW mp (C)bp (C) density (g/ml)...
K2CO3 1.5 H20 Br он heat 2,3-dibromocinnamic acid trans-1-bromo-2-phenylethene Compound MW mp (C)bp (C) density (g/ml) mol) 2,3-dibromocinnamic acid 307.97 93-95 (threo) n'a n a 202-204 (erythro)E K CO.1.5H:O1 methylene chloride 138.21 84.93 56.11 891 na n a n'a 39.6 n a n a 1.33 n a 3 MKOH 2. a. What is the by-product formed in this reaction (not shown in given reaction equation)? b. What is the purpose of adding 3 M KOH at the beginning of the...
Question 8 1 pts Rank the following in order of acidity-#1 being the strongest acid Assume...
Question 8 1 pts Rank the following in order of acidity-#1 being the strongest acid Assume that the universe is finite. Compound A OH Compound B: OH Compound C HO Compound D CH2 Compound A HO Compound D CH2 Compound A IChoose ] Water IChoose ] HF IChoose ] Compound B IChoose ] propane IChoose ] HCI IChoose ] Compound C IChoose ] Compound D IChoose ] Question 3 1 pts You have a 50/50 mixture of fluorene and aniline...
Part A 1. If you had used more methylene chloride in each step, you could have...
Part A 1. If you had used more methylene chloride in each step, you could have extracted more caffeine. Explain why you did not. Hint - What step would have taken longer (Hint: not drying). PART A Mass of Beaker & Caffeine Mass of Beaker 167.750g 67.6809 Mass of Caffeine 0.0 75 Calculations. Show your work and circle the answers. Mass of caffeine recovered: 012919 b) Actual:.07 % caffeine recovered: a) Predicted: 9 7:213% b) Actual: 92.105% PART B Unknown...
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...
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...
pre-laboratory Questions A 1 Explain why it is more efficient to make several extractions using small...
pre-laboratory Questions A 1 Explain why it is more efficient to make several extractions using small portions rather than one extraction using the same total volume. 2 Define the following terms: Drying agent intensity Drying agent capacity 3 Select the upper layer in each pair of mixed solvents (see Appendix C): Water and benzene Water and carbon tetrachloride Water and ether 4 Write an equation for the reaction of a benzoic acid with aqueous sodium bicarbonate. 5 Complete the following...
Chern 204-PSI, 6 . Friedel Crafts Acylation of an Unknown Benzene Compound (One weck lab The...
Chern 204-PSI, 6 . Friedel Crafts Acylation of an Unknown Benzene Compound (One weck lab The Intent of this Lab To acetylate an unknown benzene compound via a Friedel-Crafts acylation and use spectroscopic techniques to determine the acetophenone derivative's identity Introduction The Friedel-Crafts reaction dates back to before 1900 and it is still widely used today. The active electrophilic agent (an acylium ion) is classically prepared and reacts very quickly. Another appealing feature of this reaction is that the acylated...
6) Compound Y has a distribution coefficient of 4.0 when extracted from water with chloroform, with...
6) Compound Y has a distribution coefficient of 4.0 when extracted from water with chloroform, with Y being more soluble in chloroform. How many 10.0 mL chloroform extractions would be required to extract at least 90% of Y from a 50.0 mL aqueous solution of water? 4 points Calculations Answer
Extraction Q1. Why doesn’t the neutral organic compound dissolve in the 1.5 M NaOH solution? Q2....
Extraction Q1. Why doesn’t the neutral organic compound dissolve in the 1.5 M NaOH solution? Q2. Why is diethyl ether a good choice for the organic solvent in this extraction experiment? Q3. What experimental difficulty would you encounter if you neglected to include the drying step before evaporating the ether solution of the neutral organic compound? Q4. Why are the two organic compounds recrystallized before their melting points are determined? Q5. What IR bands are most useful in distinguishing a...
K2CO3 1.5 H20 Br он heat 2,3-dibromocinnamic acid trans-1-bromo-2-phenylethene Compound MW mp (C)bp (C) density (g/ml) mol) 2,3-dibromocinnamic acid 307.97 93-95 (threo) n'a n a 202-204 (erythro)E K CO.1.5H:O1 methylene chloride 138.21 84.93 56.11 891 na n a n'a 39.6 n a n a 1.33 n a 3 MKOH 2. a. What is the by-product formed in this reaction (not shown in given reaction equation)? b. What is the purpose of adding 3 M KOH at the beginning of the...
Question 8 1 pts Rank the following in order of acidity-#1 being the strongest acid Assume that the universe is finite. Compound A OH Compound B: OH Compound C HO Compound D CH2 Compound A HO Compound D CH2 Compound A IChoose ] Water IChoose ] HF IChoose ] Compound B IChoose ] propane IChoose ] HCI IChoose ] Compound C IChoose ] Compound D IChoose ] Question 3 1 pts You have a 50/50 mixture of fluorene and aniline...
Part A 1. If you had used more methylene chloride in each step, you could have extracted more caffeine. Explain why you did not. Hint - What step would have taken longer (Hint: not drying). PART A Mass of Beaker & Caffeine Mass of Beaker 167.750g 67.6809 Mass of Caffeine 0.0 75 Calculations. Show your work and circle the answers. Mass of caffeine recovered: 012919 b) Actual:.07 % caffeine recovered: a) Predicted: 9 7:213% b) Actual: 92.105% PART B Unknown...
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...
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...
Chern 204-PSI, 6 . Friedel Crafts Acylation of an Unknown Benzene Compound (One weck lab The Intent of this Lab To acetylate an unknown benzene compound via a Friedel-Crafts acylation and use spectroscopic techniques to determine the acetophenone derivative's identity Introduction The Friedel-Crafts reaction dates back to before 1900 and it is still widely used today. The active electrophilic agent (an acylium ion) is classically prepared and reacts very quickly. Another appealing feature of this reaction is that the acylated...
6) Compound Y has a distribution coefficient of 4.0 when extracted from water with chloroform, with Y being more soluble in chloroform. How many 10.0 mL chloroform extractions would be required to extract at least 90% of Y from a 50.0 mL aqueous solution of water? 4 points Calculations Answer
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