(a) Interpretation: The structure of methyl red is to be predicted. Concept introduction: Amines are the organic compounds that are formed by replacement of hydrogen from ammonia. The formation of diazonium salt from aromatic amines takes place using sodium nitrite and hydrochloric acid at low temperatures. This process is known as diazotization.

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Answer 1

Question

Chapter 23, Problem 23.53AP

Interpretation Introduction

(a)

Interpretation:

The structure of methyl red is to be predicted.

Concept introduction:

Amines are the organic compounds that are formed by replacement of hydrogen from ammonia. The formation of diazonium salt from aromatic amines takes place using sodium nitrite and hydrochloric acid at low temperatures. This process is known as diazotization.

Interpretation Introduction

(b)

Interpretation:

The reason as to for the statement that the color of methyl red solution changes very little in the pH=2.3 the color of the solution changes dramatically from red to yellow in pH=5.0 is to be stated.

Concept introduction:

Acid-base indicators are used to check whether the given solution is acidic, basic or neutral in nature. The common indicators are methyl red, litmus, bromthymol, and phenolphthalein. These indicators are used in acid-base titrations to indicate the endpoint of the titration.

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1. Calculate the accurate monoisotopic mass (using all 1H, 12C, 14N, 160 and 35CI) for your product using the table in your lab manual. Don't include the Cl, since you should only have [M+H]*. Compare this to the value you see on the LC-MS printout. How much different are they? 2. There are four isotopic peaks for the [M+H]* ion at m/z 240, 241, 242 and 243. For one point of extra credit, explain what each of these is and why they are present. 3. There is a fragment ion at m/z 184. For one point of extra credit, identify this fragment and confirm by calculating the accurate monoisotopic mass. 4. The UV spectrum is also at the bottom of your printout. For one point of extra credit, look up the UV spectrum of bupropion on Google Images and compare to your spectrum. Do they match? Cite your source. 5. For most of you, there will be a second chromatographic peak whose m/z is 74 (to a round number). For one point of extra credit, see if you can identify this molecule as well and confirm by…

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Answer 2

Question

Chapter 23, Problem 23.53AP

Interpretation Introduction

(a)

Interpretation:

The structure of methyl red is to be predicted.

Concept introduction:

Amines are the organic compounds that are formed by replacement of hydrogen from ammonia. The formation of diazonium salt from aromatic amines takes place using sodium nitrite and hydrochloric acid at low temperatures. This process is known as diazotization.

Interpretation Introduction

(b)

Interpretation:

The reason as to for the statement that the color of methyl red solution changes very little in the pH=2.3 the color of the solution changes dramatically from red to yellow in pH=5.0 is to be stated.

Concept introduction:

Acid-base indicators are used to check whether the given solution is acidic, basic or neutral in nature. The common indicators are methyl red, litmus, bromthymol, and phenolphthalein. These indicators are used in acid-base titrations to indicate the endpoint of the titration.

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Answer 3

Question

Chapter 23, Problem 23.53AP

Interpretation Introduction

(a)

Interpretation:

The structure of methyl red is to be predicted.

Concept introduction:

Amines are the organic compounds that are formed by replacement of hydrogen from ammonia. The formation of diazonium salt from aromatic amines takes place using sodium nitrite and hydrochloric acid at low temperatures. This process is known as diazotization.

Interpretation Introduction

(b)

Interpretation:

The reason as to for the statement that the color of methyl red solution changes very little in the pH=2.3 the color of the solution changes dramatically from red to yellow in pH=5.0 is to be stated.

Concept introduction:

Acid-base indicators are used to check whether the given solution is acidic, basic or neutral in nature. The common indicators are methyl red, litmus, bromthymol, and phenolphthalein. These indicators are used in acid-base titrations to indicate the endpoint of the titration.

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Check out a sample textbook solution

See solution

Answer 4

Question

Chapter 23, Problem 23.53AP

Interpretation Introduction

(a)

Interpretation:

The structure of methyl red is to be predicted.

Concept introduction:

Amines are the organic compounds that are formed by replacement of hydrogen from ammonia. The formation of diazonium salt from aromatic amines takes place using sodium nitrite and hydrochloric acid at low temperatures. This process is known as diazotization.

Interpretation Introduction

(b)

Interpretation:

The reason as to for the statement that the color of methyl red solution changes very little in the pH=2.3 the color of the solution changes dramatically from red to yellow in pH=5.0 is to be stated.

Concept introduction:

Acid-base indicators are used to check whether the given solution is acidic, basic or neutral in nature. The common indicators are methyl red, litmus, bromthymol, and phenolphthalein. These indicators are used in acid-base titrations to indicate the endpoint of the titration.

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Answer 5

Chapter 23, Problem 23.53AP

Interpretation Introduction

(a)

Interpretation:

The structure of methyl red is to be predicted.

Concept introduction:

Amines are the organic compounds that are formed by replacement of hydrogen from ammonia. The formation of diazonium salt from aromatic amines takes place using sodium nitrite and hydrochloric acid at low temperatures. This process is known as diazotization.

Interpretation Introduction

(b)

Interpretation:

The reason as to for the statement that the color of methyl red solution changes very little in the pH=2.3 the color of the solution changes dramatically from red to yellow in pH=5.0 is to be stated.

Concept introduction:

Acid-base indicators are used to check whether the given solution is acidic, basic or neutral in nature. The common indicators are methyl red, litmus, bromthymol, and phenolphthalein. These indicators are used in acid-base titrations to indicate the endpoint of the titration.

Answer 6

Chapter 23, Problem 23.53AP

Interpretation Introduction

(a)

Interpretation:

The structure of methyl red is to be predicted.

Concept introduction:

Amines are the organic compounds that are formed by replacement of hydrogen from ammonia. The formation of diazonium salt from aromatic amines takes place using sodium nitrite and hydrochloric acid at low temperatures. This process is known as diazotization.

Answer 7

Chapter 23, Problem 23.53AP

Interpretation Introduction

(a)

Interpretation:

The structure of methyl red is to be predicted.

Concept introduction:

Amines are the organic compounds that are formed by replacement of hydrogen from ammonia. The formation of diazonium salt from aromatic amines takes place using sodium nitrite and hydrochloric acid at low temperatures. This process is known as diazotization.

Answer 8

Interpretation Introduction

(b)

Interpretation:

The reason as to for the statement that the color of methyl red solution changes very little in the pH=2.3 the color of the solution changes dramatically from red to yellow in pH=5.0 is to be stated.

Concept introduction:

Acid-base indicators are used to check whether the given solution is acidic, basic or neutral in nature. The common indicators are methyl red, litmus, bromthymol, and phenolphthalein. These indicators are used in acid-base titrations to indicate the endpoint of the titration.

Answer 9

Interpretation Introduction

(b)

Interpretation:

The reason as to for the statement that the color of methyl red solution changes very little in the pH=2.3 the color of the solution changes dramatically from red to yellow in pH=5.0 is to be stated.

Concept introduction:

Acid-base indicators are used to check whether the given solution is acidic, basic or neutral in nature. The common indicators are methyl red, litmus, bromthymol, and phenolphthalein. These indicators are used in acid-base titrations to indicate the endpoint of the titration.

Answer 10

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Answer 12

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Answer 13

Ch. 23 - Prob. 23.1P Ch. 23 - Prob. 23.2P Ch. 23 - Prob. 23.3P Ch. 23 - Prob. 23.4P Ch. 23 - Prob. 23.5P Ch. 23 - Prob. 23.6P Ch. 23 - Prob. 23.7P Ch. 23 - Prob. 23.8P Ch. 23 - Prob. 23.9P Ch. 23 - Prob. 23.10P

Solution Summary: The author explains that the structure of methyl red is shown in Figure 2. Anthranilic acid reacts with N,N- dimethylaniline in aqueous solution.

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Chapter 23 Solutions