4.2 Exercise 26

Complete and balance each of the following half-reactions (steps 2–5 in half-reaction method):

(a) $\text{Sn}^{4+} \left(a q\right) \rightarrow \text{Sn}^{2+} \left(a q\right)$

(b) $\left[\text{Ag} \left(\text{NH}_{3}\right)_{2}\right]^{+} \left(a q\right) \rightarrow \text{Ag} \left(s\right) + \text{NH}_{3} \left(a q\right)$

(c) $\text{Hg}_{2} \text{Cl}_{2} \left(s\right) \rightarrow \text{Hg} \left(l\right) + \text{Cl}^{−} \left(a q\right)$

(d) $\text{H}_{2} \text{O} \left(l\right) \rightarrow \text{O}_{2} \left(g\right)$ (in acidic solution)

(e) $\text{IO}_{3} ^{−} \left(a q\right) \rightarrow \text{I}_{2} \left(s\right)$ (in basic solution)

(f) $\text{SO}_{3} ^{2−} \left(a q\right) \rightarrow \text{SO}_{4} ^{2−} \left(a q\right)$ (in acidic solution)

(g) $\text{MnO}_{4} ^{−} \left(a q\right) \rightarrow \text{Mn}^{2+} \left(a q\right)$ (in acidic solution)

(h) $\text{Cl}^{−} \left(a q\right) \rightarrow \text{ClO}_{3} ^{−} \left(a q\right)$ (in basic solution)