Chapter 17, Problem 17.24P

a)

Interpretation Introduction

Interpretation:

The oxidation half reactions have to be balanced and the stoichiometry coefficients have to be given.

Concept Introduction:

Half reactions:

A half reaction can be defined as component of redox reaction that is either Oxidation or reduction reaction. The change in oxidation states of individual substances present in redox reaction gives the half reaction. Half reactions are common methods of balancing redox reactions.

b)

Interpretation Introduction

Interpretation:

The number of molecules of Oxygen that is necessary to balance the half reaction by reduction of Oxygen has to be calculated.

c)

Interpretation Introduction

Interpretation:

The number of moles of Oxygen that would be necessary for oxidation has to be calculated.

d)

Interpretation Introduction

Interpretation:

The chemical oxygen demand of the sample has to be calculated.

e)

Interpretation Introduction

Interpretation:

The concentration in $\text{mol/L}$ has to be calculated.

Concept Introduction:

The number of moles per litre of the solution is called as Molarity. Molarity can be defined as the moles of solute (in grams) to the volume of the solution (in litres). The molarity of a solution can be given by the formula,

$\text{Molarity(M)=}\frac{\text{Moles}\text{of}\text{solute(in}\text{g)}}{\text{Volume}\text{of}\text{solution(in}\text{L)}}$