0.0719 of caffeine is dissolved in 4.00 ml of deionized water and extracted with 6.00 ml of dichloromethane. The partition coefficient for the extraction is 4.06. What mass of caffeine remains in the aqueous layer?

0.0719 of caffeine is dissolved in 4.00 ml of deionized water and extracted with 6.00 ml of dichloromethane. The partition coefficient for the extraction is 4.06. What mass of caffeine remains in the aqueous layer?

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter33: High-performance Liquid Chromatography

Section: Chapter Questions

Problem 33.5QAP

See similar textbooks

Related questions

Q: Write the net ionic equation for the following molecular equation. 3MgCl₂ (aq) + 2K3PO4 (aq) →…

A: Given is molecular equation,3MgCl2(aq) + 2K3-------> Mg3(PO4)2(s) + 6 KCl(aq)

Q: Macmil For the reaction Na₂CO3 + Ca(NO3)2 CaCO3 + 2 NaNO3 how many grams of calcium carbonate,…

A: Na2CO3 + Ca(NO3)2 ----> CaCO3 + 2NaNO3mass of Na2CO3 reacts = 70.7 gmass of CaCO3 produced =…

Q: The solutions listed below are in two arms of a tube and are separated by a semipermeable membrane.…

A: Given:Two solutions are there in the two arms of the tube that are separated by a semipermeable…

Q: How many molecules of SO₃ can be formed from 0.53 moles of O₂ (assuming excess SO₂) from the…

A: GivenThe given unbalanced equation SO₂(g) + O₂(g) → SO₃(g) Number of moles of O2 react…

Q: Which of the following cannot be mixed together in water to produce a buffer solution? Explain why.…

A: A buffer solution is a solution in which water is present as the solvent consisting of a mixture of…

Q: In the above redox reaction, use oxidation numbers to identify the element oxidized, the element…

A: -> Element which has oxidation number increases that is oxidized and the element which has…

Q: raw the substituents in the specified locations on the given cyclohexane ring to show the most…

A: Given is chair conformation.Most stable chair conformation is one in which more groups are…

Q: What is the equilibrium pH for a solution of 2.0x10^-3 M trisodium citrate (Na3L) and 0.30 M of…

A: The definition of "equilibrium" relates to the steady-state hydrogen and reactant concentrations…

Q: A chemical engineer is studying the following reaction: 4 HC1(g) + 0₂(g) →2 H₂O(g)+2C1₂(g) At the…

A: Answer:Relation between reaction quotient QP and equilibrium constant KP is shown below:1. When…

Q: Draw the Lewis structure What is the hybridization atoms? sp sp³ d² sp³d sp³ for C₂H₂. on the C

A: Given compound gas formula C2H2 .The general formula for this is CnHn which represents formula of…

Q: 2a. Which atom has an electron lone pair or lone pairs stabilized by resonance? 2b. Which atom has…

Q: Using curved arrows, show the mechanism for the acid-base reaction. Be sure to show all lone pair…

A: The acid is a species that gives the proton to another species. The base is a species that accepts…

Q: Two compounds, A and B are formed from elements X and Y as follows: Compound A contains 1.00 g of X…

A: Answer:Law of multiple proportions says that when two elements combine to form more than one product…

Q: Write the systematic name of each organic molecule: HO HO structure OH ů i name 0 0

A: The systematic name of each organic molecule given below with explanation.

Q: III The figure below shows the structure of several alkyl substituents. Identify the INCORRECT…

A: There are various ways to nomenclature organic compounds- 1- IUPAC nomenclature (accepted all over…

Q: How much water do you need to add lower the pH of an 325-mL barium hydroxide [Ba(OH)2] solution from…

A: The initial volume of barium hydroxide solution is .The initial pH of the barium hydroxide solution…

Q: 1. Determine the relationship between the two structures below. Circle your answer. H. Br CH3 H Dod…

A: Given is pair of structures of organic compound. Enantiomers are non-superimposable mirror images of…

Q: D10 с + 2 CH3NH₂ +

A: Given is organic reaction.Given reactants are acid chloride and amine.Acid chloride and amine react…

Q: Change 1 Sample of Substance X Change 2 Change 3

A: Any stress involved can led substance to changes which can either be physical change or chemical…

Q: A reaction between 1.00 g of TiCl4 and 0.400 g of Mg produces 0.197 g of Ti. What is the percent…

A: Recall the given reaction, The mass of the The mass of the…

Q: Discuss the different synthetic rubbers with their specific properties and uses.

Q: Name the following molecules, for which the structure is given. ..[. 3 2. tu

A: There are certain steps to name any organic compound- Step 1- find the longest carbon chainStep 2-…

Q: Drag the tiles into the numerator or denominator to form the expression. Each reaction participant…

A: chemically equilibrium in a reversible reaction is the state at which both forward and backward…

Q: Calculate the value and report to the proper number of significant digits (you may need to round…

A: Significant figures are used to represent a measurement accurately. Errors in analysis arise due to…

Q: Consider the reaction. 2 Pb(s) + O₂ (g) → 2 PbO(s) An excess of oxygen reacts with 451.4 g of lead,…

Q: Consider the reaction: C(s) + O₂(g) CO₂(g) Write the equilibrium constant for this reaction in terms…

A: For a reversible reaction, after some point in time the rate of the forward reaction becomes equal…

Q: In a laboratory experiment, students synthesized a new compound and found that when 14.57 grams of…

Q: سلم A NH₂ H3PO4 (cat) Pyridine

A: The oxygen atom of the carbonyl group (-C=O) is protonated to increase the electrophilicity of…

Q: Calculate strain energy for the conformer pictured below, using strain energy increments from the…

Q: Gaseous butane theoretical yield of water formed from the reaction of 35.5 g of butane and 60.9 g of…

A: We have to calculate the theoretical yield of water.Given: mass of butane = 35.5 gmass of oxygen =…

Q: Select to Draw I CH3CH2C(O)CI (1 equiv) AICI 3 NBS Select to Draw Zn(Hg) HCI Select to Draw

A: Benzene undergoes acylation on treatment with acyl chloride in the presence of Lewis acid. This…

Q: Write the IUPAC name for the compound below. Be sure to use correct punctuation. CH2–CH2–CH2–CH3 CH3…

A: The question belongs to Fundamentals of organic chemistry.We have to make a step by step…

Q: Prontosil is an antibacterial sulfa drug. Provide the intermediates, reagents, and product complete…

A: Prontosil is an antibacterial sulfa drug. Given is prontosil synthesis reaction.

Q: Indicate whether the pair of structures shown represent stereoisomers, constitutional isomers,…

A: Stereoisomers are isomers that have different spatial arrangements of groups.Constitutional isomers…

Q: A 0.981-g sample of canned tuna was analyzed by the Kjeldahl method. A volume of 15.48 mL of 0.105 M…

A: The mass of canned tuna is 0.981 g.The volume of HCl is ,The concentration of HCl is .The chemical…

Q: 3.46. Calculate Z and V for sulfur hexafluoride at 75°C and 15 bar by the following equations: (a)…

A: "Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Circle the compound below that is the same molecule as compound A:

A: In the given molecule, both the groups F and OH are present above the plane of the ring, that is…

Q: Write the net ionic equation for the precipitation of iron(III) hydroxide from aqueous solution:…

A: We have to write the net ionic equation for the precipitation of iron (III) hydroxide ( Fe(OH)3 ).

Q: A chemical engineer is studying the following reaction: H₂(9) + I₂(g) →2 HI(g) At the temperature…

A: Answer:Relation between Reaction quotient QP and equilibrium constant KP is shown below:1. When…

Q: Cryolite, Na, AlF6(s), an ore used in the production of aluminum, can be synthesized using aluminum…

Q: Write the following measurements, without scientific notation, using the appropriate SI prefix.…

A: If the given number contains an exponent with a negative value, then the number of 0 will be one…

Q: Calculate the pH of a 0.591 M aqueous solution of benzoic acid (CH₂COOH, K₂ = 6.3x10-5). pH =

A: Here,concentration of benzoic acid = 0.591 MKa = 6.3×10-5We have to find out pH.. Herw first we need…

Q: 17 Which of the following reactions DOES NOT proceed via an SN2 reaction mechanism? (1) (2) (3) (4)…

A: For any substrate to proceed via SN2 reaction, there must be suitable condition. The suitable…

Q: Complete the table below by deciding whether a precipitate forms when aqueous solutions A and B are…

A: Answer:When solutions of two different substances are mixed and formation of precipitate takes place…

Q: 4) Provide the major product for each of the reactions shown below. Watch out for carbocation…

A: In organic chemistry, there are two types of elimination reactions: E1 and E2.E1 (Unimolecular…

Q: CH3 1) CH3CH₂CH₂CI, AICI3, 2)HNO3, H₂SO4 CH₂ NO₂ CH₂CH₂CH3 a) Explain why the reaction provided DOES…

A: Here the first step is Friedel-Crafts alkylation. In this reaction an alkyl group is added to a…

Q: Which one of the following atoms can form a molecular compound with oxygen? chlorine iron calcium…

A: Answer:When atoms from more than one element combine together to form a stable molecule then such…

Q: H3C CH3CH₂ 14 Br Nat CN DMSO ?

A: Here is the reaction in between alkyl halide and the nucleophile CN- (from NaCN), in presence of…

Q: A 1.40 mg of solution of iron (III) chloride is added to enough water to make a 255 mL solution at…

A: Molarity is a method of expressing concentration of solution.It is defined as moles of solute…

Q: What is the vapor pressure of ethanol (in mmHg) at 42.9 °C if its vapor pressure is 400.0 mmHg at…

A: Answer:The Clausius-Clapeyron Equation is given by:

Question

0.0719 of caffeine is dissolved in 4.00 ml of deionized water and extracted with 6.00 ml of dichloromethane.
The partition coefficient for the extraction is 4.06. What mass of caffeine remains in the aqueous layer?

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: Provided information

VIEW

Step 2: Partition Coefficient

VIEW

Step 3: Calculate mass of caffeine that remains in aqueous layer

VIEW

Solution

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 4 steps with 2 images

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

The partition coefficient for caffeine between dichloromethane and water is 4.6. Assume that a 100 mL tea solution (in water) contained 100 mg of caffeine. What is the theoretical yield of caffeine in the methylene chloride if you extract with one 100 mL portion of methylene chloride?
The partition coefficient K for a compound between dichloromethane and water is determined to be 56 : 1 (K=56). If 10.0 mg of the compound is dissolved in 50.0 mL of water and this solution extracted with 25.0 mL of dichloromethane, how many mg of the compound will remain in the water layer following the extraction procedure? Show you calculations
The partition coefficient(k)of a substance between petroleum ether and water is 6. A substance of mass 12 g is dissolved in 50 mL of water. Calculate the total mass of sample that can be extracted into 40 mL of ether if the ether is used in two 20 mL portions.
A 78 mg sample of an organic compound (molar mass = 84.0 g/mol) is partitioned between 2.00 mL of water and 2.00 mL of methylene chloride. Separation and processing of the organic phase results in the isolation of 58 mg of the organic compound. Calculate the partition coefficient for the compound between methylene chloride and water (Kpmethylene chloride/water). Your answer should reflect the proper number of significant figures.
1. It can be shown mathematically that 2 or more smaller extractions (using smaller portions of asolvent) are better than 1 single extraction using a larger portion of solvent. Suppose a particularextraction proceeds with a partition coefficient, Ksp, of 10. Ksp = C2/C1 where C2/C1 is the distribution of a compound between diethyl ether (C2) andwater (C1) in grams/L. Use grams/L in your calculations. 5.00 g of an organic compound is dissolved in 100 ml of water. Show that two successive 50.0 mlextractions with diethyl ether will yield more compound than one 100 ml extraction.
Iodine is being extracted from 200 mL water using 50 mL CCl4. The partition coefficient for I2 being extracted from water into CCl4 is 85. i. Calculate the extraction efficiency when the CCl4 is used in one portion. ii. Show how the extraction efficiency is improved if the solvent is used in two portions.
substance of mass 10 g is dissolved in 50 mL of water. Calculate the total mass of sample that can be extracted into 40 mL of ether, if the ether is used in two 20 mL portions .The partition coefficient(k)of the substance between petroleum ether and water is give 4
Variation in volume of extraction solvent: compound X is dissolved in 20.0 mL of solvent B. Assuming a partition coefficient of PX,AB of 5.0, calculate the percentage of X that remains in solvent B if it is extracted the following volumes of solvent A: 1.0 mL 10.0 mL 20.0 mL 100.0 mL
A 36.0 mg sample of an organic compound (molar mass = 84.0 g/mol) is dissolved in 10.0 mL of water. This aqueous solution is extracted with 5.0 mL of hexane. Separation and analysis of the aqueous phase shows that it now contains 12.0 mg of the organic compound. Calculate the partition coefficient for the compound between hexane and water (Kphexane/water). Your answer should reflect the proper number of significant figures.
Two species A and B are known to have water/hexane partition coefficient of 5.99 and 6.16. They are separated by elution on silica gel with hexane as eluent. The ratio for the packing VS/VM =0.425 Two species A and B are known to have water/hexane partition coefficient of 5.99 and 6.16. They are separated by elution on silica gel with hexane as eluent. The ratio for the packing VS/VM =0.425a. Calculate the retention factor for each soluteb. Calculate the selectivity factorc. How many plates are needed to provide a resolution of 1.5?d. What column length should be used to provide a resolution of 1.5 if the plate height ofthe packing is 1.5 ×10-3 cm?e. If the flow rate is 6.75 cm min-1, how long will it take to elute the two species?
A solute with a partition coefficient of 4.0 is extracted from 10.0 mL of phase 1 into phase 2. a) What volume ofphase 2 is needed to extract 99% of the solute in one extraction? b) What is the total volume of solvent 2 neededto remove 99% of the solute in three equal extractions instead?
If the solubility of a drug is 3.8g/L and in chloroform 226g/L calculate its partition coefficient to 1 decimal place