Why is it possible to separate nonanthocyaninic flavonoids from anthocyanins by the extraction with ethyl acetate after acidifying aqueous solution? Justify your answer based on acid-base properties of both components.

Why is it possible to separate nonanthocyaninic flavonoids from anthocyanins by the extraction with ethyl acetate after acidifying aqueous solution? Justify your answer based on acid-base properties of both components.

Organic Chemistry

8th Edition

ISBN:9781305580350

Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Chapter21: Benzene And The Concept Of Aromaticity

Section: Chapter Questions

Problem 21.60P

See similar textbooks

Related questions

Q: Determine the pH if 50.0 mL of 0.30 M HI solution is added to 0.005 L of a 0.15 M KOH solution

A: Given, HI solution Molarity of HI solution = 0.30 M = 0.30 mol/L Volume of HI solution = 50.0 mL = 0...

Q: What is the reaction mechanism for this reaction: CI Br CI DMF, K CO2 rt 1 lohr 6M HCI,H,0:MEOH refl...

Q: Determine the molar mass of CH;OCH3. Provide an answer to two decimal places.

A: The molar mass of dimethyl ether is 46.06 g/mol.

Q: 1. a USE AN ICE TABLE METHOD To DETERMINE THE RELATONSHIP BETWEEN THE Kse VALUE AND THE MOLAR SOLUBI...

Q: The reaction below is called a dehydration reaction. Draw the major organic product. Do not draw ino...

Q: 8

Q: Using the y intercept of the line how can you determine th Ka for Bromocresol green? Please show det...

Q: Write the net ionic equation for the reaction of copper(II) sulfate with sodium sulfide. A) 2 Cu* (a...

Q: Draw a detailed free energy diagram comparing the exergonic Sy2 reactions with methoxide and ethanol...

A: Here we have to draw free energy diagram comparing the exogeneric SN2 reaction with methoxide ion an...

Q: the electric current.

Q: One of the carbons of the simplest alkyne (Ethyne) consists of a.) 2 o and 2 [I bonds c.) 1 o and 3 ...

A: ★ Correct option (a) 2 ? and 2 π-bonds. • The ethyne molecule features a triple bond between two c...

Q: Hydrogen peroxide, H2O2, is a colorless liquid whose solutions are used as a bleach and an antisepti...

Q: Calculate the heat released when 2.280 L O2 with a density of 1.11 g/L at 25°C reacts with an excesS...

Q: Explain how adding salt in cooking pasta relate to colligative properties.

Q: A 6.00 L tank at 4.54 °C is filled with 5.68 g of boron trifluoride gas and 19.3 g of sulfur hexaflu...

Q: Consider the following system at equilibrium where H° = -10.4 kJ, and Kc = 55.6, at 698 K. H2(g) + ...

Q: 8. Calculate the rate enhancement that could be accomplished by an enzyme forming one low-barrier hy...

A: we know that, The free energy of one low-barrier hydrogen bond = -79 kJ/mol as per the literature. ...

Q: O STATES OF MAT Using the combined gas law For many purposes we can treat ammonia (NH,) as an ideal ...

Q: The rate constant of a chemical reaction increased from 0.100 s to 3.20 s upon raising the temperatu...

A: Given, Rate constant (k) k1 = 0.100 s-1 k2 = 3.20 s-1 Temperature (T) T1 = 25.0 = (25.0 + 273.15) K...

Q: A small bottle of Coke contains 8 fluid ounces, or 237 mL, of soda. The nutrition label states that ...

A: Mass%= Mass of solute/Mass of solution×100

Q: Cucl has a Ksp = 1.2 x 10-6 Cut forms a complex with chloride, yielding CuCl,, with a Kf = 8.7 x 104...

Q: +0: нн H-C-C-H + HÖ-C-C-Br: :Br: H H нн

Q: It is known that the kinetics of some transforma- tion obeys the Avrami equation and that the value ...

Q: How many grams of CuSO4.5H2O should be dissolved to make 500mL of 8 x 10-3M solution?

Q: Problem #1 Provide full IUPAC names for each of the following molecules: a) H3C. b) H3C. H. ČH3 ČH3

Q: t volume in

Q: A 6.00 L tank at -2.1 °C is filled with 17.3 g of boron trifluoride gas and 13.4 g of dinitrogen mon...

Q: Evaluate the chemical reactions carefully. Predict the reagents required (marked with letters) in or...

Q: 5. a. Which bond b. Which of tl character:

A: In this question, we have to predict which bond is more polar in both the part (a) and (b):

Q: The value of Keq for the equilibrium CO2 (g) + 2H2 (g) ⇌⇌ CH3OH (g) is 14.5 at 483 °C. What is t...

Q: Classify the type of reaction is represented by the following equation: C4H3(g) + 6 O2(g) → 4 CO2(g)...

Q: In the standardization of HCl against pure anhydrous Na2CO3, 1mL was found to be equivalent to 0.05g...

A: 1 mL of HCl is equivalent to the 0.05 g of primary standard Na2CO3 . We have to calculate the normal...

Q: A chemist designs a galvanic cell that uses these two half-reactions: half-reaction standard reducti...

Q: A chemist receive different mixtures for analysis with the statement that it contain NaOH, NaHCO3 , ...

A: NaOH and NaHCO3 can't be present together in a mixture since they react to form Na2CO3. Thus, poss...

Q: Learning Goal: To use the Arrhenius equation to calculate the activation energy. As temperature rise...

Q: weak acids

A: Ka is a dissociation constant of weak acid ie. HA======H+ +A- on the titration of acid with...

Q: 11. What volume of 0.115 M HCl solution is needed to prepare 350.0 mL of a solution of HCl with pH 3...

A: Hydrogen ion concentration is an important parameter of an aqueous solution. The concentration of th...

Q: predict major product and show mechanism CH2 I. d. In (la) (CH) G. Li xplain the steps

A: Here we have to write the major product formed in the following reactions and the mechanism of react...

Q: Question 3 Why do we need to mcasure the proportion of sugar, yeast ,and water in the solution? to o...

A: Ethanol is produced through the fermentation of sugar by yeast. In a simple fermentation setup, the ...

Q: Evaluate the chemical reactions carefully. Predict the reagents required (marked with letters) in or...

A: Given : structure of reactant and product.

Q: The molar solubility of lead chromate In a water solutlon is M.

Q: Question 2 of 19 Provide the correct systematic name for the compound shown here.

A: Write IUPAC name of the given structure---

Q: In the presence of a nucleophile, which of the following will most likely undergo conjugate addition...

Q: 1. KI, EtOH/H,O; then NaOCI/H2O NH2 2. Na,S2O3, H2O; then HCI, H2O salicylamide mp 140-144 °С

Q: How many grams of NaOH is required to make 500mL of 1.5N solution?

A: Given that, Normality of solution is 1.5 N. volume is given as 500 mL 1 L = 1000 mL So 500 mL = 0.5...

Q: ОН HO (a) (b)

A: Detail synthetic scheme is shown below for both compounds

Q: A reaction A(aq)+B(aq) = C(aq) has a standard free-energy change of –3.75 kJ/mol at 25 °C. What are ...

Q: The diagram shows the energy of a reaction as the reaction progresses. Label each of the following i...

Q: 0.15- 0.05 0.02 0.04 0.06 0.08 t (s) Jse this graph to answer the following questions: What is the h...

A: Decomposition of ammonia to form hydrogen and nitrogen gas is a first order reaction. This means tha...

Q: any SI prefix in the ALEKS Data tab.) 1400 + 1200 - 1000- 800- .B energy (z) 600 400 200- Use this d...

A: Here, we have to find the energy of the ground state and the first excited state from the given imag...

Question

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

Step 3

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 3 steps with 3 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Sample Preparation in Analytical Chemistry

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

2.1g of sample are dissolved in methylene chloride and the sample is extracted with an aqueous solution of acid and base. Three compounds are isolated - 0.7g of ethyl p-aminobenzoate, 0.6 g of acetanilide, and 0.5 g of benzoic acid. Calculate the % composition of ethyl p-aminobenzoate in the recovered mixture. (Round the answer to 1 significant figure. Give just the number, not a % sign.)
A mixture is made up of low molecular weight carboxylic acid, alcohol and ester. What one step procedure can you use to extract the ester component from the mixture? Describe the process briefly
Give a methodology or article on how to identify the polyphenols (flavonoids & phenolic acid)
Consider a ternary (three-component) system of amphiphile, hydrocarbon, and water. What structure do you expect to form if small amounts of the first two components are mixed with a large amount of water?
Propose a method to separate a mixture containing phenol, benzoic acid, naphthalene, and p-nitroaniline. Phenol is soluble in sodium hydroxide solution but insoluble in neutral water or sodium bicarbonate solution. Benzoic acid is soluble in either sodium hydroxide or sodium bicarbonate solutions. Write out the structures of the molecules in your scheme.
In the Separating Acids and Neutral Compounds by Solvent Extraction experiment, why was sodium sulfate added to the tert-butyl methyl ether layer ? Group of answer choices to acidify the compounds to deprotonate the compounds to precipitate the compounds to remove traces of water
Phthalimide is insoluble in water. Will phthalimide dissolve in aqueous NaOH?
propanoic acid + methanol (in concentrated sulfuric acid)
Why is ethyl alcohol and water in liquid form an azeotropic mixture?
What is the purpose of adding sodium carbonate in the mixture of water and water- soluble components obtained from the solid-liquid extraction step of isolation of alkaloids from tea leaves? A.Increases the solubility of alkaloids in water thus ensuring maximum yield B.deprotonates tannins so that they will remain in the aqueous layer during liquid-liquid extraction C.'hydrolyses cellulose thus separating it along with other water-soluble components D.protonates the alkaloid to make the solution acidic
(b) A researcher wishes to obtain a glycoside (an organic compound) from an aqueous plant extract using the solvent extraction technique. She therefore performs the following steps: Step 1: An aqueous solution (100 mL) containing 7 g of the glycoside was shaken with 50 mL of ethyl acetate. Step 2: The resulting aqueous layer from Step 1 was further shaken with 50 mL of dichloromethane. Given that: Kp for the glycoside in ethyl acetate-water = 0.8 Kp for the glycoside in dichloromethane-water = 0.9 (i) Calculate the total mass of glycoside extracted. (ii) If the molar mass of the glycoside = 784.3 g/mol, calculate the molar concentration of the glycoside remaining in the aqueous layer after each extraction.
Salicylic acid, the active metabolite produced by the drug Aspirin, has been isolated from the European white willow tree for thousands of years. Using the structure of salicylic acid a brief explanation to 1) isolate salicylic acid ana other soluble organic components from the insoluble willow bark and 2) isolate salicylic acid from the other soluble organic components by extractive work-up. For the purposes of this exercise, you may assume that the other organic components, aside from salicylic acid, are neutral and inert (generally unreactive in the presence of acids/bases). devise HO. ОН salicylic acid