Chapter 19, Problem 115SCQ

(a)

Interpretation Introduction

Interpretation:

The amount of ${\text{O}}_{\text{2}}$ consumed in the oxidation process has to be determined for the given reaction.

Concept introduction:

Molarity is defined as the amount of moles of a compound dissolved in an amount of solvent.

$\text{Molarity (M) = }\frac{\text{Moles solute}}{\text{Litres of solute}}$

(b)

Interpretation Introduction

Interpretation:

The number of moles of electrons must be supplied to reduce the amount of ${\text{O}}_{\text{2}}$ has to be determined.

Concept introduction:

Molarity is defined as the amount of moles of a compound dissolved in an amount of solvent.

$\text{Molarity (M) = }\frac{\text{Moles solute}}{\text{Litres of solute}}$

(c)

Interpretation Introduction

Interpretation:

The current flowing per second has to be determined.

Concept introduction:

Current:

Rate of the charge which changes in time.

The formula is as follows.

$\text{Current (Amperes, A) = }\frac{\text{Electric charge (Coloumbs, C)}}{\text{time, t(seconds,s)}}$

Simplify as follows.

$\text{Current = }\frac{\text{Electric charge }}{\text{time}}$

(d)

Interpretation Introduction

Interpretation:

The rate of energy expenditure in watts has to be determined from the given data.

Concept introduction:

Molarity is defined as the amount of moles of a compound dissolved in an amount of solvent.

$\text{Molarity (M) = }\frac{\text{Moles solute}}{\text{Litres of solute}}$