Chapter 5, Problem 5H.1ST

Interpretation Introduction

Interpretation:

The activity coefficient of ${\text{Ca}}^{\text{2+}}$ ion in the given solution has to be calculated.

Concept Introduction:

Mean activity coefficient:

  For a salt like ${\text{M}}_{\text{p}}{\text{X}}_{\text{q}}$, the relationship between mean activity coefficient and the activity coefficients of the individual ions is given by,

$\begin{array}{l}{\text{γ}}_{\text{±}}\text{=}{\left({\text{γ}}_{\text{+}}{}^{\text{p}}{\text{γ}}_{\text{-}}{}^{\text{q}}\right)}^{\text{1/s}}\text{;}\text{and}\text{s}\text{=}\text{p}\text{+}\text{q}\\ \text{where,}\\ {\text{γ}}_{\text{±}}\text{-}\text{mean}\text{activity}\text{coefficient}\\ {\text{γ}}_{\text{+}}\text{-}\text{activity}\text{coefficient}\text{of}\text{a}\text{positive}\text{ion}\\ {\text{γ}}_{\text{-}}\text{-}\text{activity}\text{coefficient}\text{of}\text{a}\text{negative}\text{ion}\end{array}$