Chapter 16, Problem 58E

Assign an oxidation state to each element in each reaction and use the change in oxidation state to determine which element is being oxidized and which element is being reduced.

a. ${\text{CH}}_4(g)+2{\text{H}}_{\text{2}}\text{s}(g)\to {\text{CS}}_2(g)+{\text{4H}}_2(g)$

b. ${\text{2H}}_2\text{S}(g)\to {\text{2H}}_2(g)+{\text{S}}_2(g)$

c. ${\text{C}}_{\text{6}}{\text{H}}_{\text{12}}{\text{O}}_{\text{6}}(s)+{\text{6O}}_{\text{2}}(g)\to {\text{6CO}}_2(g)+6{\text{H}}_{\text{2}}\text{O}(g)$

d. ${\text{C}}_{\text{2}}{\text{H}}_{\text{4}}(g)+{\text{Cl}}_{\text{2}}(g)\to {\text{C}}_{\text{2}}{\text{H}}_{\text{4}}{\text{Cl}}_2(g)$