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ChemistryPrinciples of Instrumental Analysis(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 Δ A = 1 Δ ε K f C M . 1 C L + 1 Δ ε C M 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. K f − formation constant C M − concentration of metal ion C L − concentration of ligand.Start your trial now! First week only $4.99!*arrow_forward*

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7th Edition

Douglas A. Skoog + 2 others

Publisher: Cengage Learning

ISBN: 9781305577213

Chapter 14, Problem 14.23QAP

Interpretation Introduction

**(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.

K_{f} − formation constant

C_{M} − concentration of metal ion

C_{L} − concentration of ligand.

Interpretation Introduction

**(b)**

**Interpretation:**

The values of K_{f} 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.

K_{f} − formation constant

C_{M} − concentration of metal ion

C_{L} − concentration of ligand.