Chapter 17, Problem 91QRT

Interpretation Introduction

Interpretation:

The metals $\text{A}$, $\text{B}$, $\text{C}$, and $\text{D}$ has to be arranged in their increasing ability to act as reducing agents.

Concept Introduction:

A reducing agent is a reacting species in the reaction that reduces another reacting species.  A reducing agent itself gets oxidized when reacts with another species.  The reducing agent donates electrons.  An oxidizing agent is a reacting species in the reaction that oxidize another reacting species.  An oxidizing agent itself gets reduced when it reacts with another species.  The oxidizing agent accepts electrons.