In this experiment, 0.170 g of caffeine is dissolved in 10.0 mL of water. The caffeine...
In this experiment, 0.170 g of caffeine is dissolved in 10.0 mL of water. The caffeine is extracted from the aqueous solution three times with 5.0-mL portions of methylene chloride. Calculate the total amount of caffeine that can be extracted into the three portions of methylene chloride (see Technique 12, Section 12.2). Caffeine has a distribution coefficient of 4.6 between methylene chloride and water.In this experiment, 0.170 g of caffeine is dissolved in 10.0 mL of water. The caffeine is extracted from the aqueous solution three times with 5.0-mL portions of methylene chloride. Calculate the total amount of caffeine that can be extracted into the three portions of methylene chloride (see Technique 12, Section 12.2). Caffeine has a distribution coefficient of 4.6 between methylene chloride and water.
Homework Answers
Add Answer to:
In this experiment, 0.170 g of caffeine is dissolved in 10.0 mL
of water. The caffeine...
0.070 g of caffeine is dissolved in 4.0 mL of water. The caffeine is extracted from...
0.070 g of caffeine is dissolved in 4.0 mL of water. The caffeine is extracted from the aqueous solution three times in 2.0 mL portions of methylene chloride. Calculate the total amount of caffeine that can be extracted into the three portions of methylene chloride. Caffeine has a distribution coefficient of 4.6, between methylene chloride and water.
In this experiment, 0.070 g of caffeine is dissolved in 4.0 ml of water. The caffeine...
In this experiment, 0.070 g of caffeine is dissolved in 4.0 ml of water. The caffeine is extracted for the aqueous solution 3 times with 2.0 ml portions of methylene chloride. The methylene chloride extracts are combined and the solvent evaporated resulting in isolated caffeine crystals. Briefly explain why caffeine will prefer the methylene chloride solvent to the water solvent. You need to draw the structures for all three compounds.
I need help ? 3. In an experiment, 0.075 g of a compound is dissolved in...
I need help ?
3. In an experiment, 0.075 g of a compound is dissolved in 4.0 mL of water. This compound is extracted from the aqueous solution two times with 2.0 mL portions of methylene chloride. Calculate the total amount of the compound that will be extracted into methylene chloride. This compound has a distribution coefficient of 4.6 between methylene chloride and water. 4. Look up the solubilities of chlorobenzene and p-dichlorobenzene in water. Which one do you expect...
5. Consider a 0.015 L aqueous solution that contains 1.4 g of caffeine. The solubility of...
5. Consider a 0.015 L aqueous solution that contains 1.4 g of caffeine. The solubility of caffeine in water is 2.2 g/100 mL and the solubility in methylene chloride is 10.2 g/100 mL a) How much caffeine can be extracted with 15 mL of methylene chloride? b) How much caffeine will be extracted if the aqueous solution is extracted twice with 7.5 mL of methylene chloride? o) Which is more efective a or b? 2017 Wal-Mart Stores, Inc Neon Pink...
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...
1.) What percent recovery could be expected if 1.000 g of caffeine was initially dissolved in...
1.) What percent recovery could be expected if 1.000 g of
caffeine was initially dissolved in 120 mL of water and then
extracted with a single 80 mL portion of ethyl acetate?
2.) What percent recovery could be expected if 1.000 g of
caffeine was initially dissolved in 120 mL of water and then
extracted as per the protocol given in the lab manual?
3.) Percent recovery and percent yield are occasionally used as
if they are interchangeable terms. They...
If you have 3.03 g of caffeine dissolved in 59.4 mL of water and the extraction...
If you have 3.03 g of caffeine dissolved in 59.4 mL of water and the extraction coefficient between H2O and CH2Cl2 is 21.51. How many grams of caffeine will extract into the CH2Cl2 layer if you use 78.0 mL?
Let's assume the distribution coefficient of caffeine between dichloromethane and water is 3. You have a...
Let's assume the distribution coefficient of caffeine between dichloromethane and water is 3. You have a 10mL aqueous solution of caffeine that contains 100mg of caffeine dissolved in it. You also have 10mL dichloromethane. If you do just one extraction using 10mL dichloromethane, how much caffeine you can recover from the aqueous solution? 25mg 50mg 75mg 100mg None of the above QUESTION 3 Let's assume the distribution coefficient of caffeine between dichloromethane and water is 3. You have a 10mL...
1) Explain how saturated NaCl solution would help draw the water away from the organic layer in the emulsion layer....
1) Explain how saturated NaCl solution would help draw the water away from the organic layer in the emulsion layer. 2) You have a solution of 30 mg of caffeine dissolved in 100 mL of water. The partition coefficient for aqueous caffeine extracted with Dichloromethane (CH2C12) is 4.6. Show all work for the following calculations: a. Calculate the total mg extracted by using a single 30 mL portion of dichloromethane. b. Calculate the total mg extracted by using a three...
46.7 g of caffeine (C3H 10N402, 194g/mol) is dissolved in 847 mL of water (H20, 18.0...
46.7 g of caffeine (C3H 10N402, 194g/mol) is dissolved in 847 mL of water (H20, 18.0 g/mol). The density of water is 1.00 g/mL. What is the mole percent of caffeine in the solution? 28.4% 5.51% 0.509% 0.512%
I need help ?
3. In an experiment, 0.075 g of a compound is dissolved in 4.0 mL of water. This compound is extracted from the aqueous solution two times with 2.0 mL portions of methylene chloride. Calculate the total amount of the compound that will be extracted into methylene chloride. This compound has a distribution coefficient of 4.6 between methylene chloride and water. 4. Look up the solubilities of chlorobenzene and p-dichlorobenzene in water. Which one do you expect...
5. Consider a 0.015 L aqueous solution that contains 1.4 g of caffeine. The solubility of caffeine in water is 2.2 g/100 mL and the solubility in methylene chloride is 10.2 g/100 mL a) How much caffeine can be extracted with 15 mL of methylene chloride? b) How much caffeine will be extracted if the aqueous solution is extracted twice with 7.5 mL of methylene chloride? o) Which is more efective a or b? 2017 Wal-Mart Stores, Inc Neon Pink...
1.) What percent recovery could be expected if 1.000 g of
caffeine was initially dissolved in 120 mL of water and then
extracted with a single 80 mL portion of ethyl acetate?
2.) What percent recovery could be expected if 1.000 g of
caffeine was initially dissolved in 120 mL of water and then
extracted as per the protocol given in the lab manual?
3.) Percent recovery and percent yield are occasionally used as
if they are interchangeable terms. They...
1) Explain how saturated NaCl solution would help draw the water away from the organic layer in the emulsion layer. 2) You have a solution of 30 mg of caffeine dissolved in 100 mL of water. The partition coefficient for aqueous caffeine extracted with Dichloromethane (CH2C12) is 4.6. Show all work for the following calculations: a. Calculate the total mg extracted by using a single 30 mL portion of dichloromethane. b. Calculate the total mg extracted by using a three...
46.7 g of caffeine (C3H 10N402, 194g/mol) is dissolved in 847 mL of water (H20, 18.0 g/mol). The density of water is 1.00 g/mL. What is the mole percent of caffeine in the solution? 28.4% 5.51% 0.509% 0.512%
Most questions answered within 3 hours.
-
The Williams have a stock they have held for over a year that
they believe is...
asked 31 minutes ago -
11.53g sample of NaBr contains 22.34% Na by mass Considering
the law of constant composition how...
asked 1 hour ago -
Exercise 5-22A Complete the accounting cycle using receivable
transactions (LO5–1, 5–2, 5–4, 5–5, 5–7) [The following...
asked 2 hours ago -
Do you agree with the view that small businesses are more
vulnerable to employee theft because...
asked 2 hours ago -
Four forces act on an object, given by A = 41.3 N east, B = 46.3...
asked 3 hours ago -
Which of the following design considerations leads to more
user-friendly presentation layers for GUIs? [Check all...
asked 3 hours ago -
38%
of adults say cashews are their favorite kind of nut. You
randomly select 12 adults...
asked 6 hours ago -
Notational Inc. is considering installing a new server. The
machine costs $100,000 and is expected to...
asked 6 hours ago -
Given the information coding of DNA strand:
5'-TTT-TAC-GAA-GAG-TGA-3',
Write the corresponding DNA template and mRNA strand...
asked 6 hours ago -
2. Boris recently synthesized an explosive compound he named
Badenoughium. The molecular formula for Bdenoughium is...
asked 10 hours ago -
5. A car decelerate evenly from a velocity of 50mph until rest
in a distance of...
asked 10 hours ago -
IN HTML Programming
1. Write a script that inputs integers (one at a time) and
passes...
asked 10 hours ago