Chapter 11, Problem 108AE

a)

Interpretation Introduction

Interpretation:Whether ${\text{Co}}^{3+}$ or ${\text{Co}}^{2+}$ is primary product on dissolution in $\text{1}\text{.0 }M{\text{ HNO}}_{\text{3}}$ should be determined.

Concept introduction:Study of interchange between electrical and chemical energy falls under branch of chemistry called electrochemistry. It includes occurrence of oxidation and reduction reactions. This includes production of electric current from chemical reaction and vice-versa.

Reactions that occur in galvanic cells can be broken down into two half-cell reactions. One half-cell reaction is that of reduction whereas another half-cell reaction is that of oxidation.

b)

Interpretation Introduction

Interpretation: Whether it is possible to change concentration of ${\text{HNO}}_{\text{3}}$ to obtain different result in part (a) should be determined.

Concept introduction:Study of interchange between electrical and chemical energy falls under branch of chemistry called electrochemistry. It includes occurrence of oxidation and reduction reactions. This includes production of electric current from chemical reaction and vice-versa.

Reactions that occur in galvanic cells can be broken down into two half-cell reactions. One half-cell reaction is that of reduction whereas another half-cell reaction is that of oxidation.