Chapter 6, Problem 6.38P

(a)

Interpretation Introduction

Interpretation:

The pair $\left({\text{H,H}}^{\text{+}}\right)$ that has relative larger size has to be given.

Concept Introduction:

Rules to compare the size of two ions:

1. 1) For ions from the same parent species, cation is smaller in ion than its parent and anion is bigger.

   For example: ${\text{Na}}^{\text{+}}$ ion is smaller than sodium, chlorine ion is bigger than chlorine.

2. 2) Higher the magnitude of charge on cation smaller is the size of the cation.

   For example:  ${\text{Fe}}^{\text{2+}}$ is bigger than ${\text{Fe}}^{\text{3+}}.$

3. 3) Higher than magnitude of charge on anion larger the size of anion.

   For example:  ${\text{N}}^{\text{2-}}$ is smaller than ${\text{N}}^{\text{3-}}\text{.}$

(b)

Interpretation Introduction

Interpretation:

The pair $\left({\text{Fe}}^{\text{2+}}{\text{,Fe}}^{\text{3+}}\right)$ that has relative larger size has to be given.

Concept Introduction:

Refer to part (a).

(c)

Interpretation Introduction

Interpretation:

The pair $\left({\text{S}}^{\text{2-}}\text{,S}\right)$ that has relative larger size has to be given.

Concept Introduction:

Refer to part (a).

(d)

Interpretation Introduction

Interpretation:

The pair $\left({\text{O}}^{\text{2-}}{\text{,O}}^{\text{-}}\right)$ that has relative larger size has to be given.

Concept Introduction:

Refer to part (a).