Chapter 18, Problem 109E

(a)

Interpretation Introduction

Interpretation:

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

The reaction taking place at cathode is,

${\text{Ni}}^{2+}+2{\text{e}}^{-}\to \text{Ni}$

The reaction taking place at anode is,

$2{\text{Br}}^{-}\to {\text{Br}}_{\text{2}}\text{+}2{\text{e}}^{-}$

(b)

Interpretation Introduction

Interpretation:

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

The reaction taking place at cathode is,

${\text{Al}}^{3+}+3{\text{e}}^{-}\to \text{Al}$

The reaction taking place at anode is,

$2{\text{F}}^{-}\to {\text{F}}_{\text{2}}\text{+}2{\text{e}}^{-}$

(c)

Interpretation Introduction

Interpretation:

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