Note : In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion : Ag+/Ag increases with increase in concentration of Ag+ ions.
Reason : Ag+/Ag has a positive value.
Ag+(aq) + e- → Ag(S) E° = + 0.80 V, i.e., positive radox potential
According to the Nernst equation,
At 25°C,
Ecell= 
- 0.059 log 
(For, n=1)
= 
- 0.059 log 
(Since, molar concentration of an element in the solid state is equal to one, because the ratio of their density to their molar mass remains the same throughout the reaction)
= 
+ 0.059 log[Ag+]
We know, 
for Ag+/Ag couple is fixed. Thus, with increase in Ag+ concentration, i.e., [Ag+], log[Ag+] increases. Thus, Ecell value also increases.
Hence, EAg+/Ag increases with increase in concentration of Ag+ ions.