Chapter 18, Problem 18.61SP

Describe galvanic cells that use the following reactions. In each case, write the anode and cathode half-reactions and sketch the experimental setup. Label the anode and cathode, identify the sign of each electrode, and indicate the direction of electron and ion flow.

(a) $3{\text{Cu}}^{2+}\left(aq\right)+2\text{Cr}\left(s\right)\to 3\text{Cu}\left(s\right)+2{\text{Cr}}^{3+}\left(aq\right)$

(b) $\text{Pb}\left(s\right)+2{\text{H}}^{+}\left(aq\right)\to {\text{Pb}}^{2+}\left(aq\right)+{\text{H}}_2\left(g\right)$

(c) ${\text{Cl}}_2\left(g\right)+{\text{Sn}}^{2+}\left(aq\right)\to {\text{Sn}}^{4+}\left(aq\right)+2{\text{CI}}^{-}\left(aq\right)$