A voltaic cell is constructed that uses the following reaction and operates at 298 K.
(Ered Ni+2 is -0.277)
Zn(s) + Ni2+(aq) Zn2+(aq) + Ni(s)
(a) What is the emf of this cell under standard conditions?
(b) What is the emf of this cell when [Ni2+] = 3.16 M and [Zn2+] = 0.196 M?