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ChemistryPrinciples of Instrumental Analysis(a) Interpretation: Absorbance values of the conjugate acid-base pair solutions of different concentrations at 430 nm and 600 nm should be calculated. Concept introduction: The absorbance can be calculated using the following formula: A = ε bc Where, A = absorbance ε = molar absorptivity b = path length in cm c = concentration of the sample The total absorbance of a conjugate acid-base solution can be calculated as below, HIn ⇔ H + + In − A = ε In - b[In - ] + ε HIn b[HIn - ] For the given conjugate acid-base pair, equilibrium can be written as, HIn + H 2 O ⇔ H 3 O + + In − K a = 8.00 × 10 − 5 = [ H + ] [ In − ] [ HIn ]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 13, Problem 13.11QAP

Interpretation Introduction

**(a)**

**Interpretation:**

Absorbance values of the conjugate acid-base pair solutions of different concentrations at

**Concept introduction:**

The absorbance can be calculated using the following formula:

For the given conjugate acid-base pair, equilibrium can be written as,

Interpretation Introduction

**(b)**

**Interpretation:**

Absorbance as a function of indicator concentration should be plotted.