(a) Interpretation: A graph should be plotted using the spreadsheet for given information. Concept introduction: Flame emission spectrography is so named because the atoms are exposed to a flame to get the required amount of energy of excitation. This is a classical method and has been widely replaced by the plasma spectroscopies.

Question

A molecular exclusion column has a diameter of 7.8 mm and a length of 30 cm. The solid portion of the particles occupies 20% of the volume, the pores occupy 40%, and the volume between particles occupies 40%. (a) At what volume would totally excluded molecules be expected to emerge? (b) At what volume would the smallest molecules be expected? (c) A mixture of polymers of various molecular masses is eluted between 23 and 27 mL. What does this imply about the retention mechanism for these solutes on the column?

Answer 1

Question

Chapter 9, Problem 9.21QAP

Interpretation Introduction

(a)

Interpretation:

A graph should be plotted using the spreadsheet for given information.

Concept introduction:

Flame emission spectrography is so named because the atoms are exposed to a flame to get the required amount of energy of excitation. This is a classical method and has been widely replaced by the plasma spectroscopies.

Interpretation Introduction

(b)

Interpretation:

The least square equation for the given data should be determined.

Concept introduction:

Flame emission spectrography is named so, because the atoms are exposed to a flame to get the required amount of energy of excitation. This is a classical method and has been widely replaced by the plasma spectroscopies.

Interpretation Introduction

(c)

Interpretation:

The statistics of the line plotted in option b should be determined.

Introduction:

Flame emission spectrography is so named because the atoms are exposed to a flame to get the required amount of energy of excitation. This is a classical method and has been widely replaced by the plasma spectroscopies.

Interpretation Introduction

(d)

Interpretation:

The percentage of Na₂O in each given sample and the absolute and relative standard deviations should be determined.

Introduction:

Flame emission spectrography is so named because the atoms are exposed to a flame to get the required amount of energy of excitation. This is a classical method and has been widely replaced by the plasma spectroscopies.

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A molecular exclusion column has a diameter of 7.8 mm and a length of 30 cm. The solid portion of the particles occupies 20% of the volume, the pores occupy 40%, and the volume between particles occupies 40%. (a) At what volume would totally excluded molecules be expected to emerge? (b) At what volume would the smallest molecules be expected? (c) A mixture of polymers of various molecular masses is eluted between 23 and 27 mL. What does this imply about the retention mechanism for these solutes on the column?

Exactly 5.00 mL aliquots of a solution containing analyte X were transferred into 50.00-mL volumetric flasks and the pH of the solution is adjusted to 9.0. The following volumes of a standard solution containing 2.00 µg/mL of X were then added into each flask and the mixture was diluted to volume: 0.000, 0.500, 1.00, 1.50 and 2.00 mL. The fluorescence of each of these solutions was measured with a fluorometer, and the following values were obtained: 3.26, 4.80, 6.42, 8.02 and 9.56, respectively. ii. Using relevant functions in Excel, derive a least-squares equation for the data, and use the parameters of this equation to find the concentration of the phenobarbital in the unknown solution.

The determination of iron in wines was carried out by atomic absorption spectrophotometry, using the standard addition method. To do this, 10 mL of wine were placed in five 50 mL volumetric flasks; then 0, 5, 10, 15 and 20 mL of a 10 ppm iron standard solution were added to each of them. Next, they were gauged with distilled water and the absorbance was measured, obtaining the values of 0.040, 0.062, 0.081, 0.102 and 0.125 respectively. Calculate the regression parameters and obtain the iron concentration in the wine, in µg / mL.

Answer 2

Question

Chapter 9, Problem 9.21QAP

Interpretation Introduction

(a)

Interpretation:

A graph should be plotted using the spreadsheet for given information.

Concept introduction:

Flame emission spectrography is so named because the atoms are exposed to a flame to get the required amount of energy of excitation. This is a classical method and has been widely replaced by the plasma spectroscopies.

Interpretation Introduction

(b)

Interpretation:

The least square equation for the given data should be determined.

Concept introduction:

Flame emission spectrography is named so, because the atoms are exposed to a flame to get the required amount of energy of excitation. This is a classical method and has been widely replaced by the plasma spectroscopies.

Interpretation Introduction

(c)

Interpretation:

The statistics of the line plotted in option b should be determined.

Introduction:

Flame emission spectrography is so named because the atoms are exposed to a flame to get the required amount of energy of excitation. This is a classical method and has been widely replaced by the plasma spectroscopies.

Interpretation Introduction

(d)

Interpretation:

The percentage of Na₂O in each given sample and the absolute and relative standard deviations should be determined.

Introduction:

Flame emission spectrography is so named because the atoms are exposed to a flame to get the required amount of energy of excitation. This is a classical method and has been widely replaced by the plasma spectroscopies.

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Answer 3

Question

Chapter 9, Problem 9.21QAP

Interpretation Introduction

(a)

Interpretation:

A graph should be plotted using the spreadsheet for given information.

Concept introduction:

Flame emission spectrography is so named because the atoms are exposed to a flame to get the required amount of energy of excitation. This is a classical method and has been widely replaced by the plasma spectroscopies.

Interpretation Introduction

(b)

Interpretation:

The least square equation for the given data should be determined.

Concept introduction:

Flame emission spectrography is named so, because the atoms are exposed to a flame to get the required amount of energy of excitation. This is a classical method and has been widely replaced by the plasma spectroscopies.

Interpretation Introduction

(c)

Interpretation:

The statistics of the line plotted in option b should be determined.

Introduction:

Flame emission spectrography is so named because the atoms are exposed to a flame to get the required amount of energy of excitation. This is a classical method and has been widely replaced by the plasma spectroscopies.

Interpretation Introduction

(d)

Interpretation:

The percentage of Na₂O in each given sample and the absolute and relative standard deviations should be determined.

Introduction:

Flame emission spectrography is so named because the atoms are exposed to a flame to get the required amount of energy of excitation. This is a classical method and has been widely replaced by the plasma spectroscopies.

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Answer 4

Question

Chapter 9, Problem 9.21QAP

Interpretation Introduction

(a)

Interpretation:

A graph should be plotted using the spreadsheet for given information.

Concept introduction:

Flame emission spectrography is so named because the atoms are exposed to a flame to get the required amount of energy of excitation. This is a classical method and has been widely replaced by the plasma spectroscopies.

Interpretation Introduction

(b)

Interpretation:

The least square equation for the given data should be determined.

Concept introduction:

Flame emission spectrography is named so, because the atoms are exposed to a flame to get the required amount of energy of excitation. This is a classical method and has been widely replaced by the plasma spectroscopies.

Interpretation Introduction

(c)

Interpretation:

The statistics of the line plotted in option b should be determined.

Introduction:

Flame emission spectrography is so named because the atoms are exposed to a flame to get the required amount of energy of excitation. This is a classical method and has been widely replaced by the plasma spectroscopies.

Interpretation Introduction

(d)

Interpretation:

The percentage of Na₂O in each given sample and the absolute and relative standard deviations should be determined.

Introduction:

Flame emission spectrography is so named because the atoms are exposed to a flame to get the required amount of energy of excitation. This is a classical method and has been widely replaced by the plasma spectroscopies.

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Answer 5

Chapter 9, Problem 9.21QAP

Interpretation Introduction

(a)

Interpretation:

A graph should be plotted using the spreadsheet for given information.

Concept introduction:

Flame emission spectrography is so named because the atoms are exposed to a flame to get the required amount of energy of excitation. This is a classical method and has been widely replaced by the plasma spectroscopies.

Interpretation Introduction

(b)

Interpretation:

The least square equation for the given data should be determined.

Concept introduction:

Flame emission spectrography is named so, because the atoms are exposed to a flame to get the required amount of energy of excitation. This is a classical method and has been widely replaced by the plasma spectroscopies.

Interpretation Introduction

(c)

Interpretation:

The statistics of the line plotted in option b should be determined.

Introduction:

Flame emission spectrography is so named because the atoms are exposed to a flame to get the required amount of energy of excitation. This is a classical method and has been widely replaced by the plasma spectroscopies.

Interpretation Introduction

(d)

Interpretation:

The percentage of Na₂O in each given sample and the absolute and relative standard deviations should be determined.

Introduction:

Flame emission spectrography is so named because the atoms are exposed to a flame to get the required amount of energy of excitation. This is a classical method and has been widely replaced by the plasma spectroscopies.

Answer 6

Chapter 9, Problem 9.21QAP

Interpretation Introduction

(a)

Interpretation:

A graph should be plotted using the spreadsheet for given information.

Concept introduction:

Flame emission spectrography is so named because the atoms are exposed to a flame to get the required amount of energy of excitation. This is a classical method and has been widely replaced by the plasma spectroscopies.

Answer 7

Chapter 9, Problem 9.21QAP

Interpretation Introduction

(a)

Interpretation:

A graph should be plotted using the spreadsheet for given information.

Concept introduction:

Flame emission spectrography is so named because the atoms are exposed to a flame to get the required amount of energy of excitation. This is a classical method and has been widely replaced by the plasma spectroscopies.

Answer 8

Interpretation Introduction

(b)

Interpretation:

The least square equation for the given data should be determined.

Concept introduction:

Flame emission spectrography is named so, because the atoms are exposed to a flame to get the required amount of energy of excitation. This is a classical method and has been widely replaced by the plasma spectroscopies.

Answer 9

Interpretation Introduction

(b)

Interpretation:

The least square equation for the given data should be determined.

Concept introduction:

Flame emission spectrography is named so, because the atoms are exposed to a flame to get the required amount of energy of excitation. This is a classical method and has been widely replaced by the plasma spectroscopies.

Answer 10

Interpretation Introduction

(c)

Interpretation:

The statistics of the line plotted in option b should be determined.

Introduction:

Flame emission spectrography is so named because the atoms are exposed to a flame to get the required amount of energy of excitation. This is a classical method and has been widely replaced by the plasma spectroscopies.

Answer 11

Interpretation Introduction

(c)

Interpretation:

The statistics of the line plotted in option b should be determined.

Introduction:

Flame emission spectrography is so named because the atoms are exposed to a flame to get the required amount of energy of excitation. This is a classical method and has been widely replaced by the plasma spectroscopies.

Answer 12

Interpretation Introduction

(d)

Interpretation:

The percentage of Na₂O in each given sample and the absolute and relative standard deviations should be determined.

Introduction:

Flame emission spectrography is so named because the atoms are exposed to a flame to get the required amount of energy of excitation. This is a classical method and has been widely replaced by the plasma spectroscopies.

Answer 13

Interpretation Introduction

(d)

Interpretation:

The percentage of Na₂O in each given sample and the absolute and relative standard deviations should be determined.

Introduction:

Flame emission spectrography is so named because the atoms are exposed to a flame to get the required amount of energy of excitation. This is a classical method and has been widely replaced by the plasma spectroscopies.

Answer 14

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Ch. 9 - Prob. 9.1QAP Ch. 9 - Prob. 9.2QAP Ch. 9 - Why is an electrothermal atomizer more sensitive...Ch. 9 - Prob. 9.4QAP Ch. 9 - Prob. 9.5QAP Ch. 9 - Prob. 9.6QAP Ch. 9 - Prob. 9.7QAP Ch. 9 - Prob. 9.8QAP Ch. 9 - Prob. 9.9QAP Ch. 9 - Prob. 9.10QAP

Chapter 9 Solutions