Chapter 16, Problem 61E

Balance each redox reaction using the half-reaction method.

a. $\text{K}(s)+{\text{Cr}}^{\text{3+}}(aq)\to \text{Cr}(s)+{\text{K}}^{+}(aq)$

b. $\text{Mg}(s)+{\text{Ag}}^{\text{+}}(aq)\to {\text{Mg}}^{2+}(aq)+\text{Ag}(s)$

c. $\text{Al}(s)+{\text{Fe}}^{\text{2+}}(aq)\to {\text{Al}}^{3+}(aq)+\text{Fe}(s)$