Chapter 18, Problem 18.44QE

For each of the reactions, calculate E° from the table of standard potentials, and state whether the reaction is spontaneous as written or spontaneous in the reverse direction under standard conditions.

(a) $\text{Zn}\left(\text{s}\right)+{\text{Fe}}^{2+}\left(\text{aq}\right)\to {\text{Zn}}^{2+}\left(\text{aq}\right)+\text{Fe}\left(\text{s}\right)$

(b) $\text{AgCl}\left(\text{s}\right)+{\text{Fe}}^{2+}\left(\text{aq}\right)\to \text{Ag}\left(\text{s}\right)+{\text{Fe}}^{3+}\left(\text{aq}\right)+{\text{Cl}}^{-}\left(\text{aq}\right)$

(c) ${\text{Br}}_2\left(\mathcal{l}\right)+2{\text{Cl}}^{-}\left(\text{aq}\right)\to {\text{Cl}}_2\left(\text{g}\right)+2{\text{Br}}^{-}\left(\text{aq}\right)$