Chapter 13, Problem 13.9QAP

Interpretation Introduction

Interpretation:

The solution containing $6.4\text{ppm}$ iron(III) after treating with excess of KSCN to form $\text{Fe}{\left(\text{SCN}\right)}^{\text{2+}}$ and it is diluted to $50\text{ml}$. The absorbance of the resulting solution should be determined.

Concept introduction:

The absorbance of the solution is the ability of the solution to absorb the monochromatic light passing through it. The absorbance of the solution is defined as the ratio of the intensity of light incident on the solution to the intensity of light absorbed by the solution.

The relation between the initial and final concentration of the solution after dilution can be given by.

$M_1{V}_1=M_2{V}_2$

The relation between the absorbance, path length, molar absorptivity and the concentration of the complex solution is:

$A=\epsilon bc$