Chapter 9, Problem 9.158QP

Interpretation Introduction

Interpretation:

The concentration of ${\text{KMnO}}_{\text{4}}$ sample solution should be determined by using given absorbance’s and concentrations of standard solutions.

Concept introduction:

Beer-Lambert law:

• The absorbance of electromagnetic radiation for a chemical compound is directly proportional to the concentration and path length of the compound.

$\text{A}\text{=}\text{εbc}$

Where,

$\begin{array}{l}\text{A = }\text{Absorbance}\\ \text{ε}\text{=}\text{Molar}\text{absorptivity}\\ \text{b}\text{=}\text{Path}\text{length}\text{of}\text{the}\text{solution}\text{(cm)}\\ \text{c}\text{=}\text{Molar}\text{comcentration}\text{of}\text{the}\text{solution}\end{array}$