Concept explainers
(a)
Interpretation:
The formation constant and the difference in molar absorptivities at 470 nm should be determined using linear regression and the Benesi-Hildebrand equation.
Concept introduction:
The Benesi-Hildebrand equation is:
b − length of the solution light passes through
ΔA − difference between absorbance with and without the ligand present
Δe − difference of the molar absorptivities of complex and metal ion.
Kf − formation constant
CM − concentration of metal ion
CL − concentration of ligand.
(b)
Interpretation:
The values of Kf and Δe should be determined using non-linear regression.
Concept introduction:
b − length of the solution light passes through
ΔA − difference between absorbance with and without the ligand present
Δe − difference of the molar absorptivities of complex and metal ion.
Kf − formation constant
CM − concentration of metal ion
CL − concentration of ligand.
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PRINCIPLES OF INSTRUMENTAL ANALYSIS
- Principles of Instrumental AnalysisChemistryISBN:9781305577213Author:Douglas A. Skoog, F. James Holler, Stanley R. CrouchPublisher:Cengage Learning