A Zn wire and Ag/AgCl reference electrode saturated with KCl (=0.197 V) are placed into a solution of ZnSO4 . The Zn wire is attached to the positive terminal and the Ag/AgCl electrode is attached to the negative terminal of the potentiometer. Calculate the [Zn2+] in the solution if the cell potential, cell , is 1.081 V . The standard reduction potential of the Zn2+/Zn half-reaction is 0.762 V .