Principles of Instrumental Analysis
Principles of Instrumental Analysis
7th Edition
ISBN: 9781305577213
Author: Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher: Cengage Learning
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Chapter 13, Problem 13.25QAP
Interpretation Introduction

Interpretation:

As several absorbance values have been given under 440 nm, the most accurate way is to construct a graph between absorbance & the concentration of Cr2O72- solution. After using the value of slope & considering the chemical equation of Beer-Lambert law, absorptivity and the molar absorptivity of Cr2O72-should be calculated.

Concept introduction:

The absorbance of light can be determined by the Beer-Lambert law. The chemical equation relevant to the law is,

A=clε

Where,

A = Absorbance

c = Concentration of the solution

l = Path length of the cell

ε = Absorptivity of the solution

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Principles of Instrumental Analysis
Chemistry
ISBN:9781305577213
Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:Cengage Learning