Whether compounds with zero R f value if developed with hexane are necessarily identical or not should be determined. Concept introduction: TLC or thin layer chromatography is technique that is used to separate various components of mixture with help of stationary phase and mobile phase. It makes use of silica gel, cellulose or aluminum oxide. This procedure is widely used because of its simplicity, low cost efficiency, and high sensitivity. Retention factor or R f refers to distance that is travelled by liquid to reach top of chromatographic plate. All compounds have particular value of R f for specific solvent. This value is used for comparison of unknown samples with known compounds.

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Answer 1

Question

Chapter 3.3, Problem 25E

a)

Interpretation Introduction

Interpretation:Whether compounds with zero Rf value if developed with hexane are necessarily identical or not should be determined.

Concept introduction: TLC or thin layer chromatography is technique that is used to separate various components of mixture with help of stationary phase and mobile phase. It makes use of silica gel, cellulose or aluminum oxide. This procedure is widely used because of its simplicity, low cost efficiency, and high sensitivity.

Retention factor or Rf refers to distance that is travelled by liquid to reach top of chromatographic plate. All compounds have particular value of Rf for specific solvent. This value is used for comparison of unknown samples with known compounds.

b)

Interpretation Introduction

Interpretation:Step that can be done to get nonzero value of Rf should be determined.

Concept introduction: TLC or thin layer chromatography is technique that is used to separate various components of mixture with help of stationary phase and mobile phase. It makes use of silica gel, cellulose or aluminum oxide. This procedure is widely used because of its simplicity, low cost efficiency and high sensitivity.

Retention factor or Rf refers to distance that is travelled by liquid to reach top of chromatographic plate. All compounds have particular value of Rf for specific solvent. This value is used for comparison of unknown samples with known compounds.

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Students have asked these similar questions

The three TLC plates below show the analysis of the same mixture of two compounds. One plate was developed in 100% DCM, one in 90:10 DCM/MeOH, and one in 80:20 DCM/MeOH. Determine which plate was developed in which solvent.

Consider the following errors that could be made when running TLC. Indicate what should be done to correct the error.a. A two-component mixture containing 1-octene and 1,4-dimethylbenzene gave only one spot with an Rf value of 0.95. The solvent used was acetone.b. A two-component mixture containing a dicarboxylic acid and tricarboxylic acid gave only one spot with an Rf value of 0.05. The solvent used was hexane.c. When a TLC plate was developed, the solvent front ran off the top of the plate.

Concentrated sulfuric acid, H2SO4, was used to visualize the sugars (cellobiose and glucose), whose identities were confirmed by TLC. Describe the mechanism by which the sulfuric acid, H2SO4, produces visible spots where sugars are present on the TLC plate

Answer 2

Question

Chapter 3.3, Problem 25E

a)

Interpretation Introduction

Interpretation:Whether compounds with zero Rf value if developed with hexane are necessarily identical or not should be determined.

Concept introduction: TLC or thin layer chromatography is technique that is used to separate various components of mixture with help of stationary phase and mobile phase. It makes use of silica gel, cellulose or aluminum oxide. This procedure is widely used because of its simplicity, low cost efficiency, and high sensitivity.

Retention factor or Rf refers to distance that is travelled by liquid to reach top of chromatographic plate. All compounds have particular value of Rf for specific solvent. This value is used for comparison of unknown samples with known compounds.

b)

Interpretation Introduction

Interpretation:Step that can be done to get nonzero value of Rf should be determined.

Concept introduction: TLC or thin layer chromatography is technique that is used to separate various components of mixture with help of stationary phase and mobile phase. It makes use of silica gel, cellulose or aluminum oxide. This procedure is widely used because of its simplicity, low cost efficiency and high sensitivity.

Retention factor or Rf refers to distance that is travelled by liquid to reach top of chromatographic plate. All compounds have particular value of Rf for specific solvent. This value is used for comparison of unknown samples with known compounds.

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Answer 3

Question

Chapter 3.3, Problem 25E

a)

Interpretation Introduction

Interpretation:Whether compounds with zero Rf value if developed with hexane are necessarily identical or not should be determined.

Concept introduction: TLC or thin layer chromatography is technique that is used to separate various components of mixture with help of stationary phase and mobile phase. It makes use of silica gel, cellulose or aluminum oxide. This procedure is widely used because of its simplicity, low cost efficiency, and high sensitivity.

Retention factor or Rf refers to distance that is travelled by liquid to reach top of chromatographic plate. All compounds have particular value of Rf for specific solvent. This value is used for comparison of unknown samples with known compounds.

b)

Interpretation Introduction

Interpretation:Step that can be done to get nonzero value of Rf should be determined.

Concept introduction: TLC or thin layer chromatography is technique that is used to separate various components of mixture with help of stationary phase and mobile phase. It makes use of silica gel, cellulose or aluminum oxide. This procedure is widely used because of its simplicity, low cost efficiency and high sensitivity.

Retention factor or Rf refers to distance that is travelled by liquid to reach top of chromatographic plate. All compounds have particular value of Rf for specific solvent. This value is used for comparison of unknown samples with known compounds.

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Answer 4

Question

Chapter 3.3, Problem 25E

a)

Interpretation Introduction

Interpretation:Whether compounds with zero Rf value if developed with hexane are necessarily identical or not should be determined.

Concept introduction: TLC or thin layer chromatography is technique that is used to separate various components of mixture with help of stationary phase and mobile phase. It makes use of silica gel, cellulose or aluminum oxide. This procedure is widely used because of its simplicity, low cost efficiency, and high sensitivity.

Retention factor or Rf refers to distance that is travelled by liquid to reach top of chromatographic plate. All compounds have particular value of Rf for specific solvent. This value is used for comparison of unknown samples with known compounds.

b)

Interpretation Introduction

Interpretation:Step that can be done to get nonzero value of Rf should be determined.

Concept introduction: TLC or thin layer chromatography is technique that is used to separate various components of mixture with help of stationary phase and mobile phase. It makes use of silica gel, cellulose or aluminum oxide. This procedure is widely used because of its simplicity, low cost efficiency and high sensitivity.

Retention factor or Rf refers to distance that is travelled by liquid to reach top of chromatographic plate. All compounds have particular value of Rf for specific solvent. This value is used for comparison of unknown samples with known compounds.

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Answer 5

Chapter 3.3, Problem 25E

a)

Interpretation Introduction

Interpretation:Whether compounds with zero Rf value if developed with hexane are necessarily identical or not should be determined.

Concept introduction: TLC or thin layer chromatography is technique that is used to separate various components of mixture with help of stationary phase and mobile phase. It makes use of silica gel, cellulose or aluminum oxide. This procedure is widely used because of its simplicity, low cost efficiency, and high sensitivity.

Retention factor or Rf refers to distance that is travelled by liquid to reach top of chromatographic plate. All compounds have particular value of Rf for specific solvent. This value is used for comparison of unknown samples with known compounds.

b)

Interpretation Introduction

Interpretation:Step that can be done to get nonzero value of Rf should be determined.

Concept introduction: TLC or thin layer chromatography is technique that is used to separate various components of mixture with help of stationary phase and mobile phase. It makes use of silica gel, cellulose or aluminum oxide. This procedure is widely used because of its simplicity, low cost efficiency and high sensitivity.

Retention factor or Rf refers to distance that is travelled by liquid to reach top of chromatographic plate. All compounds have particular value of Rf for specific solvent. This value is used for comparison of unknown samples with known compounds.

Answer 6

Chapter 3.3, Problem 25E

a)

Interpretation Introduction

Interpretation:Whether compounds with zero Rf value if developed with hexane are necessarily identical or not should be determined.

Concept introduction: TLC or thin layer chromatography is technique that is used to separate various components of mixture with help of stationary phase and mobile phase. It makes use of silica gel, cellulose or aluminum oxide. This procedure is widely used because of its simplicity, low cost efficiency, and high sensitivity.

Retention factor or Rf refers to distance that is travelled by liquid to reach top of chromatographic plate. All compounds have particular value of Rf for specific solvent. This value is used for comparison of unknown samples with known compounds.

Answer 7

Chapter 3.3, Problem 25E

a)

Interpretation Introduction

Interpretation:Whether compounds with zero Rf value if developed with hexane are necessarily identical or not should be determined.

Concept introduction: TLC or thin layer chromatography is technique that is used to separate various components of mixture with help of stationary phase and mobile phase. It makes use of silica gel, cellulose or aluminum oxide. This procedure is widely used because of its simplicity, low cost efficiency, and high sensitivity.

Retention factor or Rf refers to distance that is travelled by liquid to reach top of chromatographic plate. All compounds have particular value of Rf for specific solvent. This value is used for comparison of unknown samples with known compounds.

Answer 8

b)

Interpretation Introduction

Interpretation:Step that can be done to get nonzero value of Rf should be determined.

Concept introduction: TLC or thin layer chromatography is technique that is used to separate various components of mixture with help of stationary phase and mobile phase. It makes use of silica gel, cellulose or aluminum oxide. This procedure is widely used because of its simplicity, low cost efficiency and high sensitivity.

Retention factor or Rf refers to distance that is travelled by liquid to reach top of chromatographic plate. All compounds have particular value of Rf for specific solvent. This value is used for comparison of unknown samples with known compounds.

Answer 9

b)

Interpretation Introduction

Interpretation:Step that can be done to get nonzero value of Rf should be determined.

Concept introduction: TLC or thin layer chromatography is technique that is used to separate various components of mixture with help of stationary phase and mobile phase. It makes use of silica gel, cellulose or aluminum oxide. This procedure is widely used because of its simplicity, low cost efficiency and high sensitivity.

Retention factor or Rf refers to distance that is travelled by liquid to reach top of chromatographic plate. All compounds have particular value of Rf for specific solvent. This value is used for comparison of unknown samples with known compounds.

Answer 10

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Answer 11

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Answer 12

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Answer 13

Ch. 3.2 - Prob. 1E Ch. 3.2 - Prob. 2E Ch. 3.2 - Prob. 3E Ch. 3.2 - Prob. 4E Ch. 3.2 - Prob. 5E Ch. 3.2 - Prob. 6E Ch. 3.2 - Prob. 7E Ch. 3.2 - Prob. 8E Ch. 3.2 - Prob. 9E Ch. 3.2 - Prob. 10E

Solution Summary: The author explains that TLC or thin layer chromatography is used to separate various components of mixture with help of stationary phase and mobile phase. Since hexane is nonpolar solvent and both compounds remain at initial start point,

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