Chapter 12, Problem 12.10P

(a)

Interpretation Introduction

Interpretation:

Activity coefficient of ${\text{SO}}_4^{2-}$  ion that has ionic strength of $\text{0}\text{.01 M}$ has to be calculated.

Concept Introduction:

Extended Debye Huckel law quantifies activity coefficient in terms of ionic strength and hydrated size as follows:

  $\log \text{γ}=\frac{-0.51z^2\sqrt{\text{μ}}}{1+\left(\text{α}\sqrt{\text{μ}}\text{/}305\right)}$

Here

$z$ denotes charge.

$\text{μ}$ denotes ionic strength.

$\text{γ}$ denotes activity coefficient.

$\text{α}$ denotes ionic size.

(b)

Interpretation Introduction

Interpretation:

Activity coefficient of ${\text{Sc}}^{3+}$  ion that has ionic strength of $\text{0}\text{.005 M}$ has to be calculated.

Concept Introduction:

Refer to part (a).

(c)

Interpretation Introduction

Interpretation:

Activity coefficient of ${\text{Eu}}^{3+}$  ion that has ionic strength of $\text{0}\text{.1 M}$ has to be calculated.

Concept Introduction:

Refer to part (a).

(d)

Interpretation Introduction

Interpretation:

Activity coefficient of ${\left({\text{CH}}_3{\text{CH}}_2\right)}_3{\text{NH}}^{+}$ ion that has ionic strength of $\text{0}\text{.05 M}$ has to be calculated.

Concept Introduction:

Refer to part (a).