As several absorbance values have been given under 440 nm, the most accurate way is to construct a graph between absorbance & the concentration of Cr 2 O 72- solution. After using the value of slope & considering the chemical equation of Beer-Lambert law, absorptivity and the molar absorptivity of Cr 2 O 72-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 = c l ε Where, A = Absorbance c = Concentration of the solution l = Path length of the cell ε = Absorptivity of the solution

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 13.25QAP
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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