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 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,

$A=cl\epsilon$

Where,

$A$ = Absorbance

$c$ = Concentration of the solution

$l$ = Path length of the cell

$\epsilon$ = Absorptivity of the solution