Chapter 19, Problem 59RQ

For each pair of substances, use Table 19.l to choose the better reducing agent.

$\begin{array}{l}\left(\text{a}\right)\text{ Sn}\left(s\right)\text{ or Ag}\left(s\right)\left(\text{c}\right)\text{ Co}\left(s\right)\text{ or Zn}\left(s\right)\hfill \\ \left(\text{b}\right){\text{ Cl}}^{\text{-}}\text{(}aq{\text{)or Br}}^{\text{-}}\text{(}aq\text{)}\left(\text{d}\right){\text{I}}^{\text{-}}\text{(}aq\text{) or Au}\left(s\right)\hfill \end{array}$