Chapter 15, Problem 51UTC

(a)

Interpretation Introduction

Interpretation:

The following half reaction in acidic medium should be balanced.

  $\text{Zn (s)}\stackrel{}{\to }{\text{Zn}}^{2+}\text{(aq)}$

Concept Introduction :

A half reaction for a redox chemical reaction shows the half component of a given redox reaction which means it will show the oxidation and reduction of half reactions separately.

In oxidation, loss of electrons occurs whereas in reduction, gain of electrons occurs.

A balanced reaction is a reaction in which number of atoms and charges should be equal on both reactant as well as on product side.

(b)

Interpretation Introduction

Interpretation:

The following half reaction in acidic medium should be balanced.

  ${\text{SnO}}_2^{2-}\text{(aq)}\stackrel{}{\to }{\text{SnO}}_3^{2-}\text{(aq)}$

Concept Introduction :

A half reaction for a redox chemical reaction shows the half component of a given redox reaction which means it will show the oxidation and reduction of half reactions separately.

In oxidation, loss of electrons occurs whereas in reduction, gain of electrons occurs.

A balanced reaction is a reaction in which number of atoms and charges should be equal on both reactant as well as on product side.

(c)

Interpretation Introduction

Interpretation:

The following half reaction in acidic medium should be balanced.

  ${\text{SO}}_3^{2-}\text{(aq)}\stackrel{}{\to }{\text{SO}}_4^{2-}\text{(aq)}$

Concept Introduction :

A half reaction for a redox chemical reaction shows the half component of a given redox reaction which means it will show the oxidation and reduction of half reactions separately.

In oxidation, loss of electrons occurs whereas in reduction, gain of electrons occurs.

A balanced reaction is a reaction in which number of atoms and charges should be equal on reactant as well as on product side.

(d)

Interpretation Introduction

Interpretation:

The following half reaction in acidic medium should be balanced.

  ${\text{NO}}_3^{-}\text{(aq)+}\stackrel{}{\to }\text{NO(g)}$

Concept Introduction :

A half reaction for a redox chemical reaction shows the half component of a given redox reaction which means it will show the oxidation and reduction of half reactions separately.

In oxidation, loss of electrons occurs whereas in reduction, gain of electrons occurs.

A balanced reaction is a reaction in which number of atoms and charges should be equal on both reactant as well as on product side.