Chapter 5, Problem 5.13E

For each of the following equations, indicate whether the blue element has been oxidized, reduced, or neither oxidized nor reduced.

a. $\text{2Mg}\left(\text{s}\right)+{\text{O}}_{\text{2}}\left(\text{g}\right)\to \text{2MgO}\left(\text{s}\right)$

b. $\text{CuO}\left(\text{s}\right)+{\text{H}}_{\text{2}}\left(\text{g}\right)\to \text{Cu}\left(\text{s}\right)+{\text{H}}_{\text{2}}\text{O}\left(\text{g}\right)$

c. ${\text{Ag}}^{\text{+}}\left(\text{aq}\right)+{\text{Cl}}^{-}\left(\text{aq}\right)\to \text{AgCl}\left(\text{s}\right)$

d. ${\text{BaCl}}_{\text{2}}\left(\text{aq}\right)+{\text{H}}_{\text{2}}{\text{SO}}_{\text{4}}\left(\text{aq}\right)\to {\text{BaSO}}_{\text{4}}\left(\text{s}\right)+\text{2HCl}\left(\text{aq}\right)$

e. $\text{Zn}\left(\text{s}\right)+{\text{2H}}^{\text{+}}\left(\text{aq}\right)\to {\text{Zn}}^{\text{2+}}\left(\text{aq}\right)+{\text{H}}_{\text{2}}\left(\text{g}\right)$