# (a) Interpretation: Percent transmittance of the sample solution should be calculated. Concept introduction: Transmittance (T) of a medium is the fraction of incident radiation transmitted by the medium . T= P P o Where, P o = power of incident beam and P = power of transmitted beam Percent Transmittance (T%) = P P o × 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 13.14QAP
Interpretation Introduction

## (a)Interpretation:Percent transmittance of the sample solution should be calculated.Concept introduction:Transmittance (T) of a medium is the fraction of incident radiation transmitted by the medium.T=PPoWhere, Po= power of incident beam and P= power of transmitted beamPercent Transmittance (T%) = PPo×100%

Interpretation Introduction

### (b)Interpretation:Absorbance of the sample solution should be calculated.Concept introduction:The relationship between absorbance ( A ) and Transmittance (T) is as follows;A = − log(T)

Interpretation Introduction

### (c)Interpretation:Transmittance of a solution having one third of absorber that of the original sample should be calculated.Concept introduction:Beer’s law states the relationship between absorbance ( A ) and the concentration (c) of a sample:A = εbcWhere,ε=Molar absorptivityb = path length of the sample/length of the cell in cmc = concentration of the sample in moles per literAlso, A = −log(T)Where, T = Transmittance

Interpretation Introduction

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