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

Question

The absorbance of a 1.05x10-5 M Fe+3 determined at 580 nm using a 2.50-cm cell was said to be 0.200. What is the molar absorptivity of this solution in liters/mole cm?

Answer 1

Question

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 Cr₂O_{72- solution. After using the value of slope & considering the chemical equation of Beer-Lambert law, absorptivity and the molar absorptivity of Cr₂O_{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=clε

Where,

A = Absorbance

c = Concentration of the solution

l = Path length of the cell

ε = Absorptivity of the solution

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