# (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 % ) ### Principles of Instrumental Analysis

7th Edition
Douglas A. Skoog + 2 others
Publisher: Cengage Learning
ISBN: 9781305577213 ### Principles of Instrumental Analysis

7th Edition
Douglas A. Skoog + 2 others
Publisher: Cengage Learning
ISBN: 9781305577213

#### Solutions

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

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