BuyFind

Principles of Instrumental Analysis

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

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

(d)

Interpretation:

Transmittance of a solution having twice the absorber concentration 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

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