Answered: 2. Among the three solvents used in the…

2. Among the three solvents used in the separation of pigments in spinach, which produced the most effective separation? Explain your choice. a. hexane b. 70:30 hexane:acetone c. 50:50 hexane:acetone

Macroscale and Microscale Organic Experiments

7th Edition

ISBN:9781305577190

Author:Kenneth L. Williamson, Katherine M. Masters

Publisher:Kenneth L. Williamson, Katherine M. Masters

Chapter4: Recrystallization

Section: Chapter Questions

Problem 1Q

See similar textbooks

Related questions

Q: Explain the principle of working and operation of Dye Penetration Technique Inspection with neat…

Q: D- How many extractions of 20 ml portions of DCM are needed to extract 96% of caffeine from 200 ml…

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

Q: what would be the implications if the volume reduction is skipped in the recrystallization

A: Recrystallization is a purification technique often employed in the labs. it is based on the…

Q: In the estimation of glucose with benedict's reagent, the solution must be continuously heated while…

A: Introduction : Benedict's test is a chemical test used to detect reducing sugars, this test uses…

Q: 1. How does sodium 2-phenylphenolate react with acid and/or base? Draw the acid-base reaction (with…

A: This is a normal acid base reaction in which phenolate is the base and that of H+ is acid, so base…

Q: For standard turbidity measurements, the increase in signal is due to a.) higher amounts of analytes…

A: Its intensity ( scattered light ) can also be measured by this, Precipitate size and shape are…

Q: Why is it necessary to store the prepared lysates in a very low temperature?

A: necessasity to store the prepared lysates in a very low temperature.

Q: Why should the solvent not be run off the top of the paper? . What color did you observe in the…

A: Q3) In paper chromatography, the solvent should not be run off the top of the paper.

Q: (c) To study the kinetics of iodination of acetone, why starch is used as an indicator just before…

A: Here we are required to provide the reason why starch indicator is not used at the beginning rather…

Q: you performed to extraction Jquid-liquid to isobate isopentyl acetate. evey the isopentyl acetate a…

Q: 3. Why was DMSO used as the solvent in the experiment?

A: Synthesis of nerolin is an example of Williamson ether synthesis. DMSO, HMPA and alcohols that…

Q: Spinach chromatography lab: provide a short description of the following processes: a) Spinach…

A: Column chromatography is an isolation and purification technique used extensively to obtain…

Q: Which analyte gives a positive result for the Molisch Test?

Q: Diethylacetal can be detected by gas chromatography. How does this impurity arise in fermentation?

A: The fermentation product of sugar is ethanol.

Q: Explain why the 2,4-dinitrophenylhydrazone is colored and the semicarbazide is not. The reason…

A: The colour of any compund depends on the various type of transition occuring in the compound due to…

Q: Fiskesjo, is one of the pioneers of allium test. Diagram his procedure and a recently conducted…

Q: A fellow student somehow mixed an aspirin sample with paracetamol after synthesising both. Explain…

A: The functional groups are the key components associated with a molecule and they can furnish the…

Q: Measure the weight of acetylsalicylic in aspirin. note: % of acetylsalicylic acid in aspirin is 5%…

Q: 6. Explain why the reagents are added in the specific sequence described in the experiment.

A: The Winkler method can be used for the determination of measure dissolved oxygen in freshwater…

Q: 3. Explain how you would separate a mixture of 1-aminoanthracene, 1-hydoxyanthracene and anthracene…

A: The process of separation of a mixture of 1-aminoanthracene, 1-hydoxyanthracene and anthracene using…

Q: 1. Which of the following may cause an increase in the calculated percent recovery of the…

A: Solution: (1) If we use too little solvent, not all of the crystals will dissolve in the hot…

Q: answer the following questions 1. What is the purpose of flame sterilizing the inoculating loop or…

Q: which would be the best extraction procedure to ensure thorough removal of a carboxylic acid…

A: When we get carboxylic acid as an by product in an organic layer ,it becomes important to remove it.

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: create a separations flow chart for Sb3+, Fe3+, Zn2+, Al3+, Cd2+ without using sulfides or…

Q: What is the purpose of performing a blank titration in the assay of ibuprofen? A. To determine…

Q: if 54.9% of ethenol is in the distillate what would be the sloute and the solvent in the mixture?…

A: Given that, % of ethanol = 54.9% then,

Q: Draw a well labeled outline showing how the resolution of ibuprofen process worked and then fully…

A: The process by which enantiomers Of racemic Compound separated is called stereochemical Resolution.…

Q: Both acetyl chloride and acetic anhydride are good acetylating agents. Which is more preferred and

A: Acetic anhydride is very safe to use it is non corrosive. It is also cheap as compared to the acid…

Q: What are some reasons why the melting point might be lower than the literature value? (Hint: Assume…

A: A pure compound generally melts over a range of temperature. If the melting point of the sample is…

Q: |CH,CH,l,Cu-Li THF solvent [+] DIBAL-H, cold THF solvent

A: These two reactions are quite efficient to provide ketone and aldehyde from their corresponding acid…

Q: In the Isolation of caffeine from tea leaves experiment, both solid/liquid and liquid/liquid…

A: We Will Choose Correct option

Q: (i) Name any fraction, which is obtained higher up the distillation column than gas oil, and give…

A: The answer is attached-:

Q: the

A: Dear student I have given answer to your question in the image format

Q: 3. Give another dye that is made using diazonium salt chemistry/coupling reaction. Draw the dye as…

A: Azo dye:- These dyes are characterized by the presence of azo groups. The azo groups coupled with…

Q: calculate the % yield based on purified moclobemide assuming 4-(2-aminoehtyl)morpholine limiting…

A: Given: volume of 4-(2-aminoehtyl)morpholine = 1.5mL mass of purified moclobemide = 0.73g density of…

Q: Why is it so important to use only dry glassware and solvents when you hope to perform a…

A: Solution (a) when we proceed any reaction we must have to ensure that reactant must have no impurity…

Q: 1. Basically, when is glass stoppered buret used? ______________________________…

A: Given, 1. Basically, when is glass stoppered buret used? ______________________________…

Q: 3 Draw a flow chart to shows the strategy for separation of three compounds: Phenanthrene and…

A: The three components can be separated by the principle of solubility of organic and ionic compounds.…

Q: Compare the IR of pure methyl nitrobenzoate with the IR obtained after Nitration

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

Q: Why do you think there is a need to soak the crucible with 10% nitric acid for preparation in dry…

A: An analytical technique in which the sample's composition is being evaluated and the sample remains…

Q: Among the three solvents used in the separation of spinach pigments which produced the most…

A: There are different types of pigments present in the green plants like spinach. Each pigment shows a…

Q: The method of extraction for Roman chamomile is: Choose one answer. a. cold-press extraction b.…

Q: What is the purpose of testing distilled water and laboratory ethanol in the testing of ethanol?…

Q: What is the purpose of the following? a) Adding CaCl2 to the extracted organic layer in extraction…

A: CaCl2 is an anhydrous form and it is used as drying agent to absorb water.

Q: Consider the mordant dyes and alizarin red S results, specifically focusing on the use of copper…

A: The substance mordant dye can be described as the dyes that will be utilized for the dyeing of the…

Q: A fractional distillation of this mixture is carried out: what is the nature of the recovered…

A: Total mass of sample = 80 g Mass of water = 60 g Mass of nitric acid = 80-60 = 20 g number of moles…

Q: what is the reaction of acetone in Sodium nitroprusside and in Iodoform tests?

A: Given: Reaction of acetone in Sodium nitroprusside and in Iodoform tests.

Question

Explain do not copy from google

2. Among the three solvents used in the separation of pigments in spinach, which
produced the most effective separation? Explain your choice.
a. hexane
b. 70:30 hexane:acetone
c. 50:50 hexane:acetone
3. Research the pigments present on spinach leaves. Which among them correspond

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

Among the three solvents used in the separation of pigments in spinach, which produced the most effective separation? Explain your choice. a. hexaneb. 70:30 hexane:acetonec. 50:50 hexane:acetone
TEST/REAGENT EXPERIMENTAL OBSERVATION A. Orcinol a. Brick red precipitate B. Benedict's test b. Magenta solution C. Ammoniacal silver nitrate c. Colored complex D. FeCl3 d. Red to blue litmus E. C6H5SO₂Cl, excess NaOH e. Blue green compound F. NaOH, H₂O, heat f. Decolorization G. t-butyl chloride/ AICI3 g. Liquid residue (lower layer) Silver mirror H. Br₂ in water, dark h. I. NH₂OH-HCI, KOH, FeCl3 i. Orange to red crystals J. Resorcinol Red condensation product Orange precipitate K. 2,4-DNPH k. L. lodoform test I. Yellow solution m. Yellow precipitate Given the following reagents and tests above, what could best differentiate the two compounds below? Provide also the letter of the expected experimental observation and state which of the two would give positive result. i تر j. "NH₂
A mixture of the two compounds shown below is dissolved in ether. Using the information given in the experiment, select all the correct statements regarding the extraction and isolation of the two compounds. lose 0000 X OH A. X can be extracted from the organic layer using sodium hydroxide. B. Y can precipitate out of the aqueous layer by the addition of sodium hydroxide to the salt of Y. C. X can precipitate out of the aqueous layer by the addition of sodium hydroxide to the salt of X. D. Y can be extracted from the organic layer using sodium hydroxide.
2 Every batch of natural Color additives has to be certified: Please explain the solution in a. True b. False detail Usage of synthetic colors has been restricted to a maximum limit of 199-200 ppm: Please explain the solution in detail a. True b. False Gold, Silver and Lead are now added to some food dishes for decoration and health benefits: Please explain the solution in a. True b. Faise detail
Imagine that the blue component of a given mixture moved 2.5 cm from the oigin or starting line, and the solvent had traveled 10.0cm, What is the Rf for the blue dye A .4.4 B 0.25 C. 7.5 D. 25
What physical property determines which solvent sinks to the bottom when performing a liquid-liquid extraction? A. Refractive Index B. Solubility C. Density D. Boiling Point
42. Pay attention to the formula of aloe vera extract lipbalm (Aloe vera.L): Glycerin 5% Cera flava 10% Nipagin 0.18% Lanolin 15% Oleum cacao ad 100% Aloe vera extract 10% The active ingredient in the formula is .... A. glycerinB. oleum cacaoC. aloe vera extractD. cera flava 43. The effect of using ascorbic acid in cosmetics with a concentration of 50% of the total preparation is …. A. can cause skin irritationB. provides optimal effect on skin youthC. increase ROS in the bodyD. Brighten the skin optimally
3. Differentiate the dichlorocarbene and Smith-Simmons reagents.
Many operations in the chemical laboratory use “salting out” in the procedure. What do the purpose of this technique?
Thiamine is assayed by? I. Spectrophotometry II. Fluorometry III. Turbidimetry A. I, II and III B. I and II only C. II only D. I only
In a liquid – liquid extraction, what is preferable? Three extractions with a small volume or one extraction with a large volume. Explain briefly.
2. When separating acetone (an organic liquid) from LiBr (a solid impurity), which would be the most convenient means of separation? a. steam distillation b. column chromatography c. fractional distillation d. simple distillation Your answer: