Qstn D D- How many extractions of 20 ml portions of DCM areneeded to extract 96% of caffeine from 200 ml water?Q2: Use a flow chart to show how you would separatethe following compounds:

The relation between the partition ratio and amount left after n-number of extractions is shown…

Answered: D- How many extractions of 20 ml…

Science

Chemistry

D- How many extractions of 20 ml portions of DCM are needed to extract 96% of caffeine from 200 ml water?

EBK A SMALL SCALE APPROACH TO ORGANIC L

4th Edition

ISBN:9781305446021

Author:Lampman

Publisher:Lampman

Chapter11: Isolation Of Caffeine From Tea Le

Section: Chapter Questions

Problem 1Q

See similar textbooks

Related questions

Q: What would likely happen if a hot saturated solution were filtered by vacuum filtration using a…

Q: If you are extracting a substance from water into ether, is it more effective to do one extraction…

Q: 8. Which solution is of known concentration that is used to react completely with an analyte? D.…

A: Standard solution is used to react completely with an analyte.

Q: Which is the more effective extraction technique, single or multiple extractions? Explain.

A: Extraction is a process for separating chemicals based on differences in solubility in two…

Q: 2 Suppose a particular extraction proceeds with a distribution coefficient of 7.5. The mixture…

A: Given that, Distribution coefficient KD = 7.5 Certain amount of caffeine dissolved in 100 ml of…

Q: Trial % Acetic Acid 1 5.292 5.940 5.828 f. How much NaOH solution in mL would you have used per…

A: Mean is the average of the numbers, i.e., add up all the numbers, then divide by how manynumbers…

Q: The purity of triphenylmethanol is checked by TLC using 5% ethyl acetate/95% ligroin as the solvent.…

A: Given that, the polarity of the triphenylmethanol is chacked by TLC using 5% ethyl acetate/95%…

Q: The TLC plate is show below with pet ether-acetone mixture (3:1) as the mobile phase. Which spot is…

A: Given: The solvent used is ether-acetone mixture.

Q: If you are performing a solvent extraction using 1M NaHCO3 and Dichloromethane (Density = 1.325…

A: Solvent extraction is a process of separating the dissolved compound from one solvent by using…

Q: Describe how to obtain a Retention Factor. What does the retention factor tell you?

A: Retention factor of a material is the ratio of the distance the spot moved above the origin to the…

Q: Which of the spots traveled the furthest up the TLC plate corresponding to spot 3?

A: Given is, mobile solvent mixture of 95 % hexanes and 5 % ethyl acetate

Q: To prepare a 13x dilution of a bacterial culture in a final volume of 38ml, how much of the original…

Q: Using a normal phase chromatography, which solute will elute out first from column? Chlorophyll…

A: Answer In column chromatography the more polar compounds…

Q: what is the total alkalinity in mg L^-1 and mmol L^-1 CaCO3 for a sample requiring 21.25 mL of…

A: When calcium carbonate reacts with sulfuric acid, Following Reaction takes place - CaCO3 + H2SO4…

Q: Which terpene has an area of 1.32cm2? Choose... What is the total area of terpene peaks in cm2?…

A: Note: Since you have posted a question with multiple subparts, we will solve the first three…

Q: Why is it important to use high purity solvents in MS?

A: It is important to use high purity solvents in MS

Q: Assuming 2-naphtholc acid (from Question # 12) is a solid, how can you check that it is pure after…

A: The impure substance is a mixture. To check the purity of the whether after being separated is done…

Q: 6) You are given a mixture of organic compounds suspected of containing various amines (e. g.…

A: Solvent extraction- It is a technique used to separate compounds based on their relative solubility…

Q: The distribution coefficient, k for a compound “A” between hexane and water is 7.5. What weight of A…

Q: In a liquid - liquid extraction, what is preferable? Three extractions with a small volume or one…

A: Liquid-liquid extraction is also known as solvent extraction or solvent partitioning. In this…

Q: Which liquid chromatography method would you recommend for each c the following sample solution?…

A: For a polymer mixture, Size exclusion chromatography (SEC) can be used. It is a separation technique…

Q: If we are extracting 7 mg of caffeine using 8 ml dichloromethane . Does it make a difference using…

A: The question is based on the concept of solvent extraction. it is an experimental technique of…

Q: Given 60.00 g of the compound in 60.00 mL water. Calculate amount extracted using multiple (2 x…

A: Concept- In a multiple extraction procedure, a quantity of solvent is used to extract one layer…

Q: ▪ In a blood alcohol analysis by GC-FID, methanol elutes at 1 min, ethanol at 2 min, IPA at 3 min,…

A: Answer : Relative retention time = retention time of analyte / retention of known peak based on…

Q: what is the purpose of TLC Separation & Analysis of Analgesics?

A: A mixture is a type of matter which is composed of two or more substances. These are called…

Q: 7. Draw the structure of ethyl acetate and propyl acetate. Which substance is 6 expected to have the…

A: Introduction: Chromatography is a technique used to separate the mixture of solution. There are two…

Q: How many mL of resorcinol monoacetate should be used to prepare 1 pint of 15% (v/v) lotion?

A: Given, The volume of resorcinol monoacetate should be used to prepare 1 pint of 15% (v/v) lotion…

Q: Why is sodium chloride added before extraction the aqueous layer with DCM? How does magnesium…

A: DCM refers to dichloromethane and the molecular formula CH2Cl2 is used as a solvent that is…

Q: is mobile phase the eluting solvent?

Q: ▪ In a blood alcohol analysis by GC-FID, methanol elutes at 1 min, ethanol at 2 min, IPA at 3 min,…

Q: 1.What is the purpose of washing the recrystallized solid with solvent during the vacuum filtration…

A: A question based on purification, which is to be accomplished.

Q: Explain why the indicators, red and blue, are separated on the TLC plate during a chromatography…

A: Thin ayer chromatography is a chromatography technique, which is used to separate non-volatile…

Q: What is the approximate retention time of benzoate?

A: To approximate the retention time of benzoate from the plots.

Q: After acid-base extraction why is it important to wash organic layer at least once with pure water?

A: A question based on quantitative analysis, which is to be accomplished.

Q: What physical property determines which solvent sinks to the bottom when performing a liquid-liquid…

A: A separating funnel is used for carrying out liquid liquid extractions. When two liquids are shaken…

Q: (c) What is the minimum distribution ratio that permits removal of 99% of a solute from 50.0 mL of…

Q: You have 100 mL of solvent available to do an extraction. Which will give a better separation? O A.…

Q: Your lab uses a UHPLC method for quantifying the active ingredient of Tylenol. The method is based…

A: a) Formula for calculating number of plates (N) in a column is N=5.54 (retention time/width at half…

Q: 7. The following is a gas chromatogram for a sample containing compounds B, and C. area A = 75 area…

A: In gas chromatography, the individual compounds of a mixture are separated by the variation in the…

Q: which procedure will produce 200ml of a solution that is 2.5%by volume alcohol of water?

A: The percentage by volume of the solution is 2.5 %. The V/V % can be calculated by the following…

Q: 2. When separating acetone (an organic liquid) from LiBr (a solid impurity), which would be the most…

A: Acetone is an organic liquid so it is volatile in nature while LiBr is solid so it is very less…

Q: You have 100 mL of solvent available to do an extraction. Which will give a better separation? a. 1…

A: The solvent extraction is more effective when the extraction is repeated with small amounts of…

Q: You are treating the TLC plate with 5% of sulfuric acid in ethanol. Briefly describe how this works.

A: Given that : We have to describe how treating the TLC plate with 5% of sulfuric acid in ethanol…

Q: A compound has a distribution coefficient of 14 between water and diethylether. If 350 mg are…

A: Given the distribution coefficient between water and diethyl ether, K = 14 Here the organic phase is…

Q: low much 10% NAOH solution would be needed to neutralize 0.5 g of benzoic acid (or to Dnvert all…

A: Given: Concentration by mass of NaOH (Assuming it by mass as nothing is given) = 10 % And mass of…

Q: Write an equation to show how you could recover the parent compounds from their respective salts (1,…

A: Given salts,

Q: Why is 95% alcohol a good solvent for extraction?

A: The substance which is present in lesser amount is termed as solute. The substance which is present…

Q: why do we have to order samples (from least concentrated -most concentrated) when measuring the…

A: A question based on qualitative analysis, which is to be accomplished.

Question

Qstn D

D- How many extractions of 20 ml portions of DCM are
needed to extract 96% of caffeine from 200 ml water?
Q2: Use a flow chart to show how you would separate
the following compounds:

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.

Similar questions

A 18 g of unknown organic sample was dissolve in 756 mL of benzene. The boiling point of benzene was increased by 3.36oC. As the first step of analysis, determine the moecular weight of the unknow sample? Kb of benzene= 2.64oC/m Bb of benzene = 80.09 oC density of benzene = 0.874 g/mL at 25 °C Answer in whole number, no units required.
If you are extracting a substance from water into ether, is itmore effective to do one extraction with 300 mL of ether or threeextractions with 100 mL?
15 g of unknown organic sample was dissolve in 575 mL of Dicloromethane (DCM). The boiling point of benzene was increased by 3.40oC. Determine the molecular weight of the unknown sample? Kb of DCM = 2.42oC/m Bb of benzene = 39.6 oC density of benzene = 1.33 g/mL at 25 °C
How will you prepare standard solution of catechin (50, 100, 150, 200, 250 and 300 mg/L) scaled down to 50 mL?
ETHER AS SOLVENTTest the solvent power 2 mL ether with 1 mL of each of the following: ethyl alcohol, benzene, dilute HCl and dilute NaOH solution.Results: ______________________________________________________________________
From a 10-mL sample, a 1-mL aliquot was taken and diluted to 100mL. From this, a 5-mL aliquot was taken and diluted to 20mL.The final 20mL was found to have a concentration of 0.004M analyte X.What is the concentration of analyte X in the 10-mL sample?
A dermatologic lotion contains 1.25 mL of liquefied phenol in 500 mL. Calculate thepercent strength of liquefied phenol in the lotion.
Determine a procedure to accurately create a 1.5•10^-6 mg Fe/mL solution using a 0.0500 mg Fe/mL standard solution and only having access to 100.0 mL volumetric flasks and 1.00, 2.00, 3.00, 4.00, 5.00 and 10.00 mL volumetric pipets. (You may have it make more than one solution by dilution to accomplish this)
If 5 teaspoonfuls of a 10% w/v povidone-iodine solution were diluted to 2 quarts with purified water, what would be the ratio strenght of the solution? (** Please show traditional method and not C1V1=C2V2 method**)
A compound has a distribution coefficient of 14 between water and diethylether. If 350 mg are present in 100 mL water, how many mL of diethylether is needed to extract 90% of the compound in a single extraction?
(c) What is the minimum distribution ratio that permits removal of 99% of a solute from 50.0 mL of water with (i) two 20.0-mL extractions with an organic solvent; (ii) four 10.0-mL extractions with the organic solvent?
How would you prepare 9 liters of 50% dye solution beginning with 60%sye solution?