Chapter 4, Problem 20E

Identify the atoms that are oxidized and reduced, the change in oxidation state for each, and the oxidizing and reducing agents in each of the following equations:

(a) $\text{Mg}\left(s\right)+{\text{NiCl}}_2\left(aq\right)\to {\text{MgCl}}_2\left(aq\right)+\text{Ni}\left(s\right)$

(b) ${\text{PCl}}_3\left(l\right)+{\text{Cl}}_2\left(g\right)\to {\text{PCl}}_5\left(s\right)$

(c) ${\text{C}}_2{\text{H}}_4\left(g\right)+3{\text{O}}_2\left(g\right)\to 2{\text{CO}}_2\left(g\right)+2{\text{H}}_2\text{O}\left(g\right)$

(d) $\text{Zn}\left(s\right)+{\text{H}}_2{\text{SO}}_4\left(aq\right)\to {\text{ZnSO}}_4\left(aq\right)+{\text{H}}_2\left(g\right)$

(e) $2{\text{K}}_2{\text{S}}_2{\text{O}}_3\left(s\right)+{\text{I}}_2\left(s\right)\to {\text{K}}_2{\text{S}}_4{\text{O}}_6\left(s\right)+2\text{KI}\left(s\right)$

(f) $3\text{Cu}\left(s\right)+8{\text{HNO}}_3\left(aq\right)\to 3\text{Cu}{\left({\text{NO}}_3\right)}_2\left(aq\right)+2\text{NO}\left(g\right)+4{\text{H}}_2\text{O}\left(l\right)$