Chapter 17, Problem 17.127CHP

For the following half-reaction, E° = 1.103 V:

     ${\text{Cu}}^{2+}\left(aq\right)+2{\text{CN}}^{-}\left(aq\right)+{\text{e}}^{-}\to \text{Cu}{\left(\text{CN}\right)}_2{}^{-}\left(aq\right)$

  Calculate the formation constant K_f for Cu(CN)₂^–.