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The reaction; ( 1 2 H _ 2( ~g ) + AgCl _ ( s ) H _ ( aq ) ⁺+ Cl _ ( aq ) ⁻+ Ag _ ( s ) ) occurs in which of the following galvanic cell :

Options

  1. A( Ag | AgCl _ ( s) | KCl _ (soln.) | AgNO _ 3 (aq.) | Ag )
  2. B( Pt | H _ 2( ~g ) | HCl _ (soln.) | AgCl _ ( s ) | Ag )
  3. C( Pt | H _ 2( ~g ) | KCl _ ( soln. ) | AgCl _ (s) | Ag )
  4. D( Pt | H _ 2( ~g ) | HCl _ (soln.) | AgNO _ 3( aq ) | Ag )

Correct answer

C. ( Pt | H _ 2( ~g ) | KCl _ ( soln. ) | AgCl _ (s) | Ag )

Step-by-step solution

Anodic half cell Gas - gas ion electrode 1 2 H _ 2( ~g ) H _ ( aq ) ⁺+ e ⁻ Cathodic Reaction Metal-metal insoluble salt anion electrode Ag _ ( aq ) ⁺+ e ⁻ Ag _ ( s ) aligned & AgCl _ ( s ) Ag _ ( aq ) ⁺+ Cl _ ( aq ) ⁻ & AgCl _ ( s ) + e ⁻ Ag _ ( s ) + Cl _ ( aq ) ⁻ aligned Overall redox reaction 1 2 H _ 2( ~g ) + AgCl _ ( s ) H _ ( aq ) ⁺+ Cl _ ( aq ) ⁻+ Ag _ ( s ) Cell Representation Pt | H _ 2( ~g ) | kCl _ (sol) | AgCl _ (s) | Ag

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