What would be the reduction potential of an electrode at 298 K , which originally contained ` 1K_(2)Cr_(2)O_(7)` solution in acidic buffer solution of `pH = 1.0` and which was treated with 50% of the Sn necessary to reduce all `Cr_(2)O_(7)^(2-)" to "Cr^(3+)`.Assume pH of solution remains constant.
Given : `E^(0)._(Cr_(2)O_(7)^(2-)//Cr^(3+), H^(+))= 1. 33 V , log 2 = 0.3 , (2.303RT)/F = 0.06`

Options

A. `1.285 V`
B. `1.193 V`
C. `1.187 V`
D. None of these

Answer

C