Chapter 11, Problem 53E

Calculate the pH of the cathode compartment for the following reaction given when ${\text{[Cr}}^{\text{3+}}\text{]=0}\text{.15}M{\text{, [Al}}^{\text{3+}}\text{]=0}\text{.30}M{\text{, and [Cr}}_{\text{2}}{\text{O}}_{\text{7}}{}^{\text{2–}}\text{]=0}\text{.55}M$ .
$\begin{array}{l}\text{2Al(}s{\text{)+Cr}}_{\text{2}}{\text{O}}_{\text{7}}{}^{\text{2–}}\text{(}aq{\text{)+14H}}^{\text{+}}\text{(}aq\text{)}\to \\ {\text{2Al}}^{\text{3+}}\text{(}aq{\text{)+2Cr}}^{\text{3+}}\text{(}aq{\text{)+7H}}_{\text{2}}\text{O(}l\text{)}\end{array}$