Chapter 5, Problem 40RQ

For the following reactions, identify the substance oxidized, the substance reduced, the oxidizing agent, and the reducing agent.

$\begin{array}{l}\left(\text{a}\right){\text{Cu + 2H}}_{\text{2}}{\text{SO}}_{\text{4}}\stackrel{}{\to }{\text{ CuSO}}_{\text{4}}{\text{+ SO}}_{\text{2}}{\text{+2H}}_{\text{2}}\text{O}\hfill \\ \left(\text{b}\right){\text{3SO}}_{\text{2}}{\text{+ 2HNO}}_{\text{3}}{\text{+2H}}_{\text{2}}\text{O}\stackrel{}{\to }{\text{ 3H}}_{\text{2}}{\text{SO}}_{\text{4}}\text{+2NO}\hfill \\ \left(\text{c}\right){\text{ 5H}}_{\text{2}}{\text{SO}}_{\text{4}}\text{+ 4Zn}\stackrel{}{\to }{\text{ 4ZnSO}}_{\text{4}}{\text{4 H}}_{\text{2}}{\text{S + 4H}}_{\text{2}}\text{O}\hfill \\ \left(\text{d}\right){\text{ I}}_{\text{2}}{\text{+ 10HNO}}_{\text{3}}\stackrel{}{\to }{\text{2HIO}}_{\text{3}}{\text{+ 10NO}}_{\text{2}}{\text{+ 4H}}_{\text{2}}\text{O}\hfill \end{array}$