Chapter 5, Problem 5H.2ST

Interpretation Introduction

Interpretation:

The mean activity coefficient for the ions in $\text{5}\text{×}{\text{10}}^{\text{-4}}\text{M}{\text{Al}}_{\text{2}}{\left({\text{SO}}_{\text{4}}\right)}_{\text{3}}$ at $\text{25}{}^{\text{o}}\text{C}$ has to be estimated.

Concept Introduction:

Debye-Huckel limiting law:

The Debye-Huckel limiting law is given by,

$\begin{array}{l}\text{log}{\text{γ}}_{\text{±}}\text{=}\text{-}\text{A}\left|{\text{z}}_{\text{+}}{\text{z}}_{\text{-}}\right|{\text{I}}^{\text{1/2}}\\ \text{where,}\\ {\text{γ}}_{\text{±}}\text{-}\text{mean}\text{activity}\text{coefficient}\\ {\text{z}}_{\text{+}}\text{and}{\text{z}}_{\text{-}}\text{-}\text{charge numbers}\text{of the ions}\\ \text{A}\text{-}\text{dimensionless}\text{constant}\left(\text{for}\text{water}\text{0}\text{.509}\right)\\ \text{I}\text{-}\text{ionic}\text{strength}\text{of}\text{the}\text{solution}\end{array}$