Chapter 19, Problem 6E

Interpretation Introduction

Interpretation:

The equation representing the tarnishing of silver, $\text{2Ag}+{\text{S}}_{\text{2}}{}^{-}\to {\text{Ag}}_2\text{S}+2{\text{e}}^{-}$ is to be classified as oxidation or reduction half-reaction.

Concept introduction:

The reactions in which one compound undergoes oxidation while the other undergoes reduction are termed as redox reactions. The molecule or compound which loses one or more electrons is said to be oxidized. The molecule or compound which gains one or more electron is said to be reduced.