(a) Interpretation: The percent transmittance and the absorbance of the absorbing solution for the linear readings given by the photometer should be determined. Concept introduction: The percent transmittance of a solution is the ability of the solution to allow the monochromatic light to pass through it. The percent transmittance of a solution is the ratio of the intensity of monochromatic light incident on the solution to the intensity transmitted through the solution. The expression for the percent transmittance for a sample solution is: % T = ( P P o ) × 100 % The absorbance of the solution is the ability of the solution to absorb the monochromatic light passing through it. The absorbance of the solution is defined as the ratio of the intensity of light incident on the solution to the intensity of light absorbed by the solution. The relation between the absorbance and transmittance is related by Beer’s law. A = − log ( T 100 % )

Question

An aqueous solution of triphosphate derivative of molar mass 502 g per mol was prepared by dissolving 17.2 mg in enough water to make 500 cubic cm of solution and a sample was transferred to a cell of length 1 cm. The absorbance was measured as 1.011. Calculate the molar absorbance coefficient and the transmittance for a solution twice the concentration.

Answer 1

Question

Chapter 13, Problem 13.15QAP

Interpretation Introduction

(a)

Interpretation:

The percent transmittance and the absorbance of the absorbing solution for the linear readings given by the photometer should be determined.

Concept introduction:

The percent transmittance of a solution is the ability of the solution to allow the monochromatic light to pass through it. The percent transmittance of a solution is the ratio of the intensity of monochromatic light incident on the solution to the intensity transmitted through the solution.

The expression for the percent transmittance for a sample solution is:

%T=(PPo)×100%

The absorbance of the solution is the ability of the solution to absorb the monochromatic light passing through it. The absorbance of the solution is defined as the ratio of the intensity of light incident on the solution to the intensity of light absorbed by the solution.

The relation between the absorbance and transmittance is related by Beer’s law.

A=−log(T100%)

Interpretation Introduction

(b)

Interpretation:

The transmittance of the solution if the concentration of the absorber is reduced to half of the original solution should be determined.

Concept introduction:

The percent transmittance of a solution is the ability of the solution to allow the monochromatic light to pass through it. The percent transmittance of a solution is the ratio of the intensity of monochromatic light incident on the solution to the intensity transmitted through the solution.

The relation between the absorbance and transmittance is established by Beer’s law.

A=−logT

Interpretation Introduction

(c)

Interpretation:

The transmittance of the solution is to be determined if the path length of the light in the cell is doubled.

Concept introduction:

The percent transmittance of a solution is the ability of the solution to allow the monochromatic light to pass through it. The percent transmittance of a solution is the ratio of the intensity of monochromatic light incident on the solution to the intensity transmitted through the solution.

The relation between the absorbance and transmittance is established by Beer’s law.

A=−logT

The absorbance of the solution is directly proportional to the path length of the cell. So, if the path length is doubled, the absorbance of the solution will also be doubled.

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An aqueous solution of triphosphate derivative of molar mass 502 g per mol was prepared by dissolving 17.2 mg in enough water to make 500 cubic cm of solution and a sample was transferred to a cell of length 1 cm. The absorbance was measured as 1.011. Calculate the molar absorbance coefficient and the transmittance for a solution twice the concentration.

The molar absorptivity for aqueous solutions of phenol at 211 nm is 6.17 × 103 L cm-1 mol-1. Calculate the permissible range of phenol concentrations if the transmittance is to be less than 85% and greater than 7% when the measurements are made in 1.00-cm cells.

A 0.0140 M solution of a certain analyte exhibits 49.8% T' at a wavelength of 280 nm. What will the percent transmittance be for a 0.0252 M solution of the same analyte? Assume the pathlengths for each measurement are equal.

Answer 2

Question

Chapter 13, Problem 13.15QAP

Interpretation Introduction

(a)

Interpretation:

The percent transmittance and the absorbance of the absorbing solution for the linear readings given by the photometer should be determined.

Concept introduction:

The percent transmittance of a solution is the ability of the solution to allow the monochromatic light to pass through it. The percent transmittance of a solution is the ratio of the intensity of monochromatic light incident on the solution to the intensity transmitted through the solution.

The expression for the percent transmittance for a sample solution is:

%T=(PPo)×100%

The absorbance of the solution is the ability of the solution to absorb the monochromatic light passing through it. The absorbance of the solution is defined as the ratio of the intensity of light incident on the solution to the intensity of light absorbed by the solution.

The relation between the absorbance and transmittance is related by Beer’s law.

A=−log(T100%)

Interpretation Introduction

(b)

Interpretation:

The transmittance of the solution if the concentration of the absorber is reduced to half of the original solution should be determined.

Concept introduction:

The percent transmittance of a solution is the ability of the solution to allow the monochromatic light to pass through it. The percent transmittance of a solution is the ratio of the intensity of monochromatic light incident on the solution to the intensity transmitted through the solution.

The relation between the absorbance and transmittance is established by Beer’s law.

A=−logT

Interpretation Introduction

(c)

Interpretation:

The transmittance of the solution is to be determined if the path length of the light in the cell is doubled.

Concept introduction:

The percent transmittance of a solution is the ability of the solution to allow the monochromatic light to pass through it. The percent transmittance of a solution is the ratio of the intensity of monochromatic light incident on the solution to the intensity transmitted through the solution.

The relation between the absorbance and transmittance is established by Beer’s law.

A=−logT

The absorbance of the solution is directly proportional to the path length of the cell. So, if the path length is doubled, the absorbance of the solution will also be doubled.

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Answer 3

Question

Chapter 13, Problem 13.15QAP

Interpretation Introduction

(a)

Interpretation:

The percent transmittance and the absorbance of the absorbing solution for the linear readings given by the photometer should be determined.

Concept introduction:

The percent transmittance of a solution is the ability of the solution to allow the monochromatic light to pass through it. The percent transmittance of a solution is the ratio of the intensity of monochromatic light incident on the solution to the intensity transmitted through the solution.

The expression for the percent transmittance for a sample solution is:

%T=(PPo)×100%

The absorbance of the solution is the ability of the solution to absorb the monochromatic light passing through it. The absorbance of the solution is defined as the ratio of the intensity of light incident on the solution to the intensity of light absorbed by the solution.

The relation between the absorbance and transmittance is related by Beer’s law.

A=−log(T100%)

Interpretation Introduction

(b)

Interpretation:

The transmittance of the solution if the concentration of the absorber is reduced to half of the original solution should be determined.

Concept introduction:

The percent transmittance of a solution is the ability of the solution to allow the monochromatic light to pass through it. The percent transmittance of a solution is the ratio of the intensity of monochromatic light incident on the solution to the intensity transmitted through the solution.

The relation between the absorbance and transmittance is established by Beer’s law.

A=−logT

Interpretation Introduction

(c)

Interpretation:

The transmittance of the solution is to be determined if the path length of the light in the cell is doubled.

Concept introduction:

The percent transmittance of a solution is the ability of the solution to allow the monochromatic light to pass through it. The percent transmittance of a solution is the ratio of the intensity of monochromatic light incident on the solution to the intensity transmitted through the solution.

The relation between the absorbance and transmittance is established by Beer’s law.

A=−logT

The absorbance of the solution is directly proportional to the path length of the cell. So, if the path length is doubled, the absorbance of the solution will also be doubled.

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Answer 4

Question

Chapter 13, Problem 13.15QAP

Interpretation Introduction

(a)

Interpretation:

The percent transmittance and the absorbance of the absorbing solution for the linear readings given by the photometer should be determined.

Concept introduction:

The percent transmittance of a solution is the ability of the solution to allow the monochromatic light to pass through it. The percent transmittance of a solution is the ratio of the intensity of monochromatic light incident on the solution to the intensity transmitted through the solution.

The expression for the percent transmittance for a sample solution is:

%T=(PPo)×100%

The absorbance of the solution is the ability of the solution to absorb the monochromatic light passing through it. The absorbance of the solution is defined as the ratio of the intensity of light incident on the solution to the intensity of light absorbed by the solution.

The relation between the absorbance and transmittance is related by Beer’s law.

A=−log(T100%)

Interpretation Introduction

(b)

Interpretation:

The transmittance of the solution if the concentration of the absorber is reduced to half of the original solution should be determined.

Concept introduction:

The percent transmittance of a solution is the ability of the solution to allow the monochromatic light to pass through it. The percent transmittance of a solution is the ratio of the intensity of monochromatic light incident on the solution to the intensity transmitted through the solution.

The relation between the absorbance and transmittance is established by Beer’s law.

A=−logT

Interpretation Introduction

(c)

Interpretation:

The transmittance of the solution is to be determined if the path length of the light in the cell is doubled.

Concept introduction:

The percent transmittance of a solution is the ability of the solution to allow the monochromatic light to pass through it. The percent transmittance of a solution is the ratio of the intensity of monochromatic light incident on the solution to the intensity transmitted through the solution.

The relation between the absorbance and transmittance is established by Beer’s law.

A=−logT

The absorbance of the solution is directly proportional to the path length of the cell. So, if the path length is doubled, the absorbance of the solution will also be doubled.

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Answer 5

Chapter 13, Problem 13.15QAP

Interpretation Introduction

(a)

Interpretation:

The percent transmittance and the absorbance of the absorbing solution for the linear readings given by the photometer should be determined.

Concept introduction:

The percent transmittance of a solution is the ability of the solution to allow the monochromatic light to pass through it. The percent transmittance of a solution is the ratio of the intensity of monochromatic light incident on the solution to the intensity transmitted through the solution.

The expression for the percent transmittance for a sample solution is:

%T=(PPo)×100%

The absorbance of the solution is the ability of the solution to absorb the monochromatic light passing through it. The absorbance of the solution is defined as the ratio of the intensity of light incident on the solution to the intensity of light absorbed by the solution.

The relation between the absorbance and transmittance is related by Beer’s law.

A=−log(T100%)

Interpretation Introduction

(b)

Interpretation:

The transmittance of the solution if the concentration of the absorber is reduced to half of the original solution should be determined.

Concept introduction:

The percent transmittance of a solution is the ability of the solution to allow the monochromatic light to pass through it. The percent transmittance of a solution is the ratio of the intensity of monochromatic light incident on the solution to the intensity transmitted through the solution.

The relation between the absorbance and transmittance is established by Beer’s law.

A=−logT

Interpretation Introduction

(c)

Interpretation:

The transmittance of the solution is to be determined if the path length of the light in the cell is doubled.

Concept introduction:

The percent transmittance of a solution is the ability of the solution to allow the monochromatic light to pass through it. The percent transmittance of a solution is the ratio of the intensity of monochromatic light incident on the solution to the intensity transmitted through the solution.

The relation between the absorbance and transmittance is established by Beer’s law.

A=−logT

The absorbance of the solution is directly proportional to the path length of the cell. So, if the path length is doubled, the absorbance of the solution will also be doubled.

Answer 6

Chapter 13, Problem 13.15QAP

Interpretation Introduction

(a)

Interpretation:

The percent transmittance and the absorbance of the absorbing solution for the linear readings given by the photometer should be determined.

Concept introduction:

The percent transmittance of a solution is the ability of the solution to allow the monochromatic light to pass through it. The percent transmittance of a solution is the ratio of the intensity of monochromatic light incident on the solution to the intensity transmitted through the solution.

The expression for the percent transmittance for a sample solution is:

%T=(PPo)×100%

The absorbance of the solution is the ability of the solution to absorb the monochromatic light passing through it. The absorbance of the solution is defined as the ratio of the intensity of light incident on the solution to the intensity of light absorbed by the solution.

The relation between the absorbance and transmittance is related by Beer’s law.

A=−log(T100%)

Answer 7

Chapter 13, Problem 13.15QAP

Interpretation Introduction

(a)

Interpretation:

The percent transmittance and the absorbance of the absorbing solution for the linear readings given by the photometer should be determined.

Concept introduction:

The percent transmittance of a solution is the ability of the solution to allow the monochromatic light to pass through it. The percent transmittance of a solution is the ratio of the intensity of monochromatic light incident on the solution to the intensity transmitted through the solution.

The expression for the percent transmittance for a sample solution is:

%T=(PPo)×100%

The absorbance of the solution is the ability of the solution to absorb the monochromatic light passing through it. The absorbance of the solution is defined as the ratio of the intensity of light incident on the solution to the intensity of light absorbed by the solution.

The relation between the absorbance and transmittance is related by Beer’s law.

A=−log(T100%)

Answer 8

Interpretation Introduction

(b)

Interpretation:

The transmittance of the solution if the concentration of the absorber is reduced to half of the original solution should be determined.

Concept introduction:

The percent transmittance of a solution is the ability of the solution to allow the monochromatic light to pass through it. The percent transmittance of a solution is the ratio of the intensity of monochromatic light incident on the solution to the intensity transmitted through the solution.

The relation between the absorbance and transmittance is established by Beer’s law.

A=−logT

Answer 9

Interpretation Introduction

(b)

Interpretation:

The transmittance of the solution if the concentration of the absorber is reduced to half of the original solution should be determined.

Concept introduction:

The percent transmittance of a solution is the ability of the solution to allow the monochromatic light to pass through it. The percent transmittance of a solution is the ratio of the intensity of monochromatic light incident on the solution to the intensity transmitted through the solution.

The relation between the absorbance and transmittance is established by Beer’s law.

A=−logT

Answer 10

Interpretation Introduction

(c)

Interpretation:

The transmittance of the solution is to be determined if the path length of the light in the cell is doubled.

Concept introduction:

The percent transmittance of a solution is the ability of the solution to allow the monochromatic light to pass through it. The percent transmittance of a solution is the ratio of the intensity of monochromatic light incident on the solution to the intensity transmitted through the solution.

The relation between the absorbance and transmittance is established by Beer’s law.

A=−logT

The absorbance of the solution is directly proportional to the path length of the cell. So, if the path length is doubled, the absorbance of the solution will also be doubled.

Answer 11

Interpretation Introduction

(c)

Interpretation:

The transmittance of the solution is to be determined if the path length of the light in the cell is doubled.

Concept introduction:

The percent transmittance of a solution is the ability of the solution to allow the monochromatic light to pass through it. The percent transmittance of a solution is the ratio of the intensity of monochromatic light incident on the solution to the intensity transmitted through the solution.

The relation between the absorbance and transmittance is established by Beer’s law.

A=−logT

The absorbance of the solution is directly proportional to the path length of the cell. So, if the path length is doubled, the absorbance of the solution will also be doubled.

Answer 12

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Solution Summary: The author explains the relationship between the percent transmittance and the absorbance of the absorbing solution for linear readings given by the photometer.

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Chapter 13 Solutions