Chapter 7.8, Problem 7.18P

Use the following reactions to arrange the elements A, B, C, and D in order of their redox reactivity from most reactive to least reactive.

$\begin{array}{ll}\text{A}+{\text{D}}^{+}\stackrel{}{\to }{\text{A}}^{+}+\text{D}\hfill & {\text{C}}^{+}+\text{D}\stackrel{}{\to }\text{C}+{\text{D}}^{+}\hfill \\ {\text{B}}^{+}+\text{D}\stackrel{}{\to }\text{B}+{\text{D}}^{+}\hfill & \text{B}+{\text{C}}^{+}\stackrel{}{\to }{\text{B}}^{+}+\text{C}\hfill \end{array}$