Principles of Instrumental Analysis
Principles of Instrumental Analysis
7th Edition
ISBN: 9781305577213
Author: Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher: Cengage Learning
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Chapter 13, Problem 13.9QAP
Interpretation Introduction

Interpretation:

The solution containing 6.4ppm iron(III) after treating with excess of KSCN to form Fe(SCN)2+ and it is diluted to 50ml. 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.

M1V1=M2V2

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

A=εbc

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