# (a) Interpretation: Molar absorptivities for In- and HIn at 485 and 625 nm should be calculated. Concept introduction: The Beer-Lambert Law is: A = ε l c A − absorbance ε - molar absorptivity l − length of the solution light passes through (cm) c − concentration of solution (mol/L)

BuyFind

### Principles of Instrumental Analysis

7th Edition
Douglas A. Skoog + 2 others
Publisher: Cengage Learning
ISBN: 9781305577213
BuyFind

### Principles of Instrumental Analysis

7th Edition
Douglas A. Skoog + 2 others
Publisher: Cengage Learning
ISBN: 9781305577213

#### Solutions

Chapter 14, Problem 14.10QAP
Interpretation Introduction

## (a)Interpretation:Molar absorptivities for In- and HIn at 485 and 625 nm should be calculated.Concept introduction:The Beer-Lambert Law is:A=εlcA − absorbanceε - molar absorptivityl − length of the solution light passes through (cm)c − concentration of solution (mol/L)

Interpretation Introduction

### (b)Interpretation:The acid dissociation constant of the indicator should be calculated.Concept introduction:The Beer-Lambert Law is:A=εlcA − absorbanceε - molar absorptivityl − length of the solution light passes through (cm)c − concentration of solution (mol/L)

Interpretation Introduction

### (c)Interpretation:pH of the solution should be calculated.Concept introduction:The formula used to determine the pH is:pH=−log[H+]Where, [H+] represents concentration of H+ ions.

Interpretation Introduction

### (d)Interpretation:The pH of the solution and Ka for the weak acid should be determined.Concept introduction:The formula used to determine the pH is:pH=−log[H+]Where, [H+] represents concentration of H+ ions.

Interpretation Introduction

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