Chapter 5, Problem 5H.2E

Interpretation Introduction

Interpretation:

The activity coefficient of ${\text{MgF}}_2$ has to be expressed.

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,

${\text{γ}}_{\text{±}}\text{=}{\left({\text{γ}}_{\text{+}}{}^{\text{p}}{\text{γ}}_{\text{-}}{}^{\text{q}}\right)}^{\text{1/s}}\text{;}\text{and}\text{s}\text{=}\text{p}\text{+}\text{q}$

Where,

${\text{γ}}_{\text{±}}\text{-}$ Mean activity coefficient

${\text{γ}}_{\text{+}}\text{-}$ Activity coefficient of a positive ion

${\text{γ}}_{\text{-}}\text{-}$ Activity coefficient of a negative ion