In the cell, Pt s H 2 g ,   1 bar   HCl   aq AgCl s Ag s Pt s , the cell potential is 0 .92…

In the cell, PtsH2g, 1bar HCl aqAgClsAgsPts,the cell potential is 0.92 V when a 10-6 molar HCl solution is used. The standard electrode potential of Ag|AgCl|Cl- electrode is:

(Given, 2.303RTF=0.06 V at 298 K)
  1. 0.76 V
  2. 0.20 V
  3. 0.40 V
  4. 0.94 V

Solution

A:12H2g→H+ aq.+e-; Eo=0.0 V
C :AgCl s+e-→Ag s+Cl-; Eo=xV
Ecell=Ecello-0.061log⁡H+Cl-
0.92=x-0.061log⁡10-12
0.92=x+0.72
x=0.92-0.72
=0.2V

Asked in: JEE Main 2019 (10 Jan Shift 2)

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