Chapter 17, Problem 8E

Balance the following in acidic solution:

(a) ${\text{SO}}_3{}^{2-}\left(aq\right)+\text{Cu}{\left(\text{OH}\right)}_2\left(s\right)\to {\text{SO}}_4{}^{2-}\left(aq\right)+\text{Cu}\left(\text{OH}\right)\left(s\right)$

(b) ${\text{O}}_2+\text{Mn}{\left(\text{OH}\right)}_2\left(s\right)\to {\text{MnO}}_2\left(s\right)$

(c) ${\text{NO}}_3{}^{-}\left(aq\right)+{\text{H}}_2\left(g\right)\to \text{NO}\left(g\right)$

(d) $\text{Al}\left(s\right)+{\text{CrO}}_4{}^{2-}\left(\text{aq}\right)\to \text{Al}{\left(\text{OH}\right)}_3\left(s\right)+\text{Cr}{\left(\text{OH}\right)}_4{}^{-}\left(aq\right)$