Chapter 17, Problem 111E

(a)

Interpretation Introduction

Interpretation:

The reactions that take place at the cathode and the anode when $1.0\text{M}$ solution of ${\text{NiBr}}_2$, ${\text{AlF}}_3$ and ${\text{MnI}}_2$ is electrolyzed.

Concept introduction:

The non-spontaneous reaction takes place in an electrolytic cell in which there occurs conversion of electrical energy into chemical energy and this is used for the electrolysis of a metal. The electrolytic cell involves a cathode and an anode, both dipped into an electrolytic solution having both the positive and negative ions.

To determine: The reactions that take place at the cathode and the anode when $1.0\text{M}$ solution of ${\text{NiBr}}_2$ is electrolyzed.

The reaction taking place at cathode is,

${\text{Ni}}^{2+}+2{\text{e}}^{-}\to \text{Ni}E{°}_{\text{red}}=-0.23\text{V}$

The reaction taking place at anode is,

$2{\text{Br}}^{-}\to {\text{Br}}_2+2{\text{e}}^{-}E{°}_{\text{ox}}=-1.09\text{V}$

(b)

Interpretation Introduction

Interpretation:

The reactions that take place at the cathode and the anode when $1.0\text{M}$ solution of ${\text{NiBr}}_2$, ${\text{AlF}}_3$ and ${\text{MnI}}_2$ is electrolyzed.

Concept introduction:

The non-spontaneous reaction takes place in an electrolytic cell in which there occurs conversion of electrical energy into chemical energy and this is used for the electrolysis of a metal. The electrolytic cell involves a cathode and an anode, both dipped into an electrolytic solution having both the positive and negative ions.

To determine: The reactions that take place at the cathode and the anode when $1.0\text{M}$ solution of ${\text{AlF}}_3$ is electrolyzed.

The reaction taking place at cathode is,

$2{\text{H}}_2\text{O}+2{\text{e}}^{-}\to {\text{H}}_2+2{\text{OH}}^{-}E{°}_{\text{red}}=-0.83\text{V}$

The reaction taking place at anode is,

$2{\text{H}}_2\text{O}\to {\text{O}}_2+4{\text{H}}^{+}+4{\text{e}}^{-}E{°}_{\text{ox}}=-1.23\text{V}$

(c)

Interpretation Introduction

Interpretation:

The reactions that take place at the cathode and the anode when $1.0\text{M}$ solution of ${\text{NiBr}}_2$, ${\text{AlF}}_3$ and ${\text{MnI}}_2$ is electrolyzed.

Concept introduction:

The non-spontaneous reaction takes place in an electrolytic cell in which there occurs conversion of electrical energy into chemical energy and this is used for the electrolysis of a metal. The electrolytic cell involves a cathode and an anode, both dipped into an electrolytic solution having both the positive and negative ions.