In the cell, Pt s H 2 g , 1 bar HCl aq AgCl s Ag s Pt s , 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 .303 RT F = 0 .06 V at 298 K )

Question

In the cell, Pt s H 2 g , 1 bar HCl aq AgCl s Ag s Pt s , 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 .303 RT F = 0 .06 V at 298 K ), 0 .76 V, 0 .20 V, 0 .40 V, 0 .94 V

MARKS App · Accepted Answer

A : 1 2 H 2 g → H + aq . + e - ; E o = 0 .0 V C : AgCl s + e - → Ag s + Cl - ; E o = xV E cell = E cell o - 0 .06 1 log ⁡ H + Cl - 0 .92 = x - 0 . 06 1 log ⁡ 10 - 12 0 .92 = x + 0 . 72 x = 0 .92 - 0 .72 = 0 . 2 V

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