Chapter 13, Problem 13.5QAP

Interpretation Introduction

Interpretation:

The molar absorptivity of the ${\text{KMnO}}_{\text{4}}$ solution having a transmittance of $0.145$ is to be calculated.

Concept introduction:

The molar absorptivity of a solution is defined as the capacity of a solution to absorb the particular wavelength of light incident on it. In order to calculate the molar absorptivity, first the absorbance of the solution is determined using the Beer’s law.

$A=-\log T$

Now, the relation between the molar absorptivity, absorbance and concentration of the solution is given by the relation.

$A=\epsilon bc$