Chapter 19.2, Problem 1PPB

Practice Problem BUILD

A galvanic cell with $E_{\text{cell}}^{\text{o}}=0.30$ V can be constructed using an iron electrode in a $\text{1}\text{.0 }M\text{ Fe}{\left({\text{NO}}_{\text{3}}\right)}_{\text{2}}$ solution, and either a tin electrode in a $\text{1}\text{.0 }M\text{ Sn}{\left({\text{NO}}_{\text{3}}\right)}_{\text{2}}$ solution, or a chromium electrode in a $\text{1}\text{.0 }M\text{ Cr}{\left({\text{NO}}_{\text{3}}\right)}_{\text{3}}$ solution—-even though ${\text{Sn}}^{\text{2+}}{\text{/Sn and Cr}}^{\text{2+}}\text{/Cr}$ have different standard reduction potentials. Explain and give the overall balanced reaction for each cell.