Chapter 17, Problem 153CP

Consider the following galvanic cell:

A 15 0-mole sample of NH  is added to the Ag compartment (assume 1.00 L of total solution after the addition). The silver ion reacts with ammonia to form complex ions as shown:

$\begin{array}{cc}{\text{Ag}}^{+}\left(aq\right)+{\text{NH}}_3\left(aq\right)\rightleftharpoons {\text{AgNH}}_3{}^{+}\left(aq\right)& K_1=2.1\times {10}^3\\ {\text{AgNH}}_{\text{3}}{}^{+}\left(aq\right)+{\text{NH}}_{\text{3}}\left(aq\right)\rightleftharpoons \text{Ag}{\left({\text{NH}}_3\right)}_2{}^{+}\left(aq\right)& K_2=8.2\times {10}^3\end{array}$

Calculate the cell potential after the addition of 15.0 moles of NH_3.