Quantitative Chemical Analysis
Quantitative Chemical Analysis
9th Edition
ISBN: 9781464135385
Author: Daniel C. Harris
Publisher: W. H. Freeman
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Chapter 13, Problem 13.9P

a)

Interpretation Introduction

Interpretation:

The pH of the solution has to be calculated by Davies equation.

Concept introduction:

Davies equation:

The activity coefficient (γ) of ions is given by

logγ=-0.51z2(µ1+µ-0.3µ)where,γ-activitycoefficientofionz-chargeofionµ-ionicstrength

b)

Interpretation Introduction

Interpretation:

The pH of the solution has to be calculated by extended Debye-Huckel equation.

Concept Introduction:

Extended Debye-Huckel equation:

The extended Debye-Huckel equation is given for solutions with less dilution ( 5×10-3<I<0.1 ). The extended Debye-Huckel equation is,

-logγ=-Az2I1/2(1-aBI1/2)

Where A and b=dielectric constants for solvent

a=effective diameter of ion

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