Chapter 11, Problem 70E

Consider a galvanic cell at standard conditions based onthe following half-reactions:

When enough NaCl(s) is added to the compartmentcontaining gold to make the ${\text{[Cl}}^{\text{–}}\text{]=0}\text{.10}$M, the cellpotential is observed to be 0.31 V. Assume that ${\text{Au}}^{\text{3+}}$ isreduced, and assume that the reaction in the compartmentcontaining gold is
${\text{Au}}^{\text{3+}}\text{(}aq{\text{)+4Cl}}^{\text{–}}\text{(}aq\text{)}\rightleftharpoons {\text{AuCl}}_{\text{4}}{}^{\text{–}}\text{(}aq\text{)}$
Calculate the value of K for this reaction at 25°C.