Chapter 4, Problem 4.84QP

Interpretation Introduction

Interpretation:

In the given ${\text{Ni}}^{2+}{}_{\text{(aq)}}{\text{ + Pb}}_{\text{(s)}}\stackrel{}{\to }{\text{ Ni}}_{\text{(s)}}{\text{ + Pb}}^{2+}{}_{\text{(aq)}}$ reaction, the species that is being oxidized and the species that is being reduced has to be identified.

Concept Introduction:

Oxidation-Reduction reactions:

The transfer of negative charge (one or more electrons) from one reactant to other reactant results in oxidation-reduction reactions.  When a subtance/species lose electrons during a reaction, then it is a oxidation reaction.  When a subtance/species gain electrons during a reaction, then it is a reduction reaction.

Oxidation reaction and reduction reaction are complementary reactions and are called as redox reactions.