Chapter 16, Problem 95E

Determine whether each reaction is a redox reaction. For those reactions that are redox reactions, identify the substance being oxidized and the substance being reduced.

a. $\text{Zn}(s)+{\text{CoCl}}_2(aq)\to {\text{ZnCl}}_2(aq)+\text{CO}(s)$

b. $\text{HI}(aq)+\text{NaOH}(aq)\to {\text{H}}_2\text{O}(l)+\text{NaI}(aq)$

c. ${\text{AgNO}}_3(aq)+\text{NaCl}(aq)\to \text{AgCl}(s)+{\text{NaNO}}_3(aq)$

d. $2\text{K}(s)+{\text{Br}}_2(l)\to 2\text{KBr}(s)$