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For the given cell Fe ²⁺ _ ( aq ) + Ag ⁺ _ ( aq ) Fe _ ( aq ) ³⁺+ Ag _ ( s ) The standard cell potential of the above reaction is Given: array lr Ag ⁺+ e ⁻ Ag & E ^ = xV Fe ²⁺+2 e ⁻ Fe & E ^ = yV Fe ³⁺+3 e ⁻ Fe & E ^ = zV array

Options

  1. Ax+y-z
  2. Bx+2 y
  3. Cx+2 y-3 z
  4. Dy-2 x

Correct answer

C. x+2 y-3 z

Step-by-step solution

Fe ²⁺( aq )+ Ag ⁺( aq ) Fe ³⁺( aq )+ Ag ( s ) aligned & G ₃^0= G ₁^0+ G ₂^0 & -3 ~F (- z )=-2 ~F (- y )+ G ₂ ^0 & G ₂^0=3 Fz -2 Fy aligned Also G ₂^0=- nFE _ Fe ⁺² / Fe ^ t⁴³ ^0 aligned & 3 Fz -2 Fy =-1 ~F ( E _ Fe ^ t^2 / Fe ⁴³ ^0 ) & E _ Fe ²⁺² / Fe ^ t^3 ^0=2 y -3 z aligned E _ Cell ^0 for reaction will be aligned & E _ Ag ⁺ / Ag ^0+ E _ Fe ^ t^2 / Fe ⁰³ & = x +2 y -3 z aligned

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