Chapter 15.2, Problem 21PP

Balance each of the following half-reactions in acidic solution:

a. ${\text{Sn}}^{2+}(aq)\to {\text{Sn}}^{4+}(aq)$

b. ${\text{Mn}}^{2+}(aq)\to {\text{MnO}}_4^{-}(aq)$

c. ${\text{NO}}_2^{-}(aq)\to {\text{NO}}_3^{-}(aq)$

d. ${\text{ClO}}_3^{-}(aq)\to {\text{ClO}}_2(aq)$