The mean activity coefficient (γ±)of a 0.2 M aqueous solution of at 298 K and 1 bar is 0.185. Under this condition, the potential of the cell:
Zn(s)∣ZnCl2(aq., 0.2 M)∣AgCl(s)∣Ag(s)
is: Eo(AgCl/Ag, Cl-)=0.22V; Eo(Zn2+/Zn)=−0.76V
1
0.58 V
2
0.71 V
3
0.65 V
4
0.50 V