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NEET2005ChemistryElectrochemistryActual

The chemical reaction, 2 AgCl _ (s) + H _ 2( ~g ) 2 HCl _ (a q) +2 Ag _ (s) taking place in a galvanic cell is represented by the notation

Options

  1. APt _ (s) H _ 2(g), , 1 bar |1 M KCl _ (a q) | AgCl _ (s) Ag _ (s)
  2. BPt _ (s) H _ 2( ~g ) , 1 bar |1 MHCl _ (a q) | 1 M Ag _ (a q) Ag _ (s)
  3. CPt _ (s) H _ 2(g), , 1 bar |1 MHCl _ (a q) | AgCl _ (s) Ag _ (s)
  4. DPt _ (s) H _ 2(g), , 1 bar |1 MHCl _ (a q) | Ag _ (s) AgCl _ (s)

Correct answer

B. Pt _ (s) H _ 2( ~g ) , 1 bar |1 MHCl _ (a q) | 1 M Ag _ (a q) Ag _ (s)

Step-by-step solution

2 AgCl _ (s) + H _ 2(g) 2 HCl _ (a q) +2 Ag _ (s) The activities of solids and liquids are taken as unity and at low concentrations, the activity of a solute is approximated to its molarity. The cell reaction will be Pt _ (s) H _ 2( ~g ) , 1 bar | H _ (a q) ⁺ 1 M | AgCl _ (a q) 1 M | Ag _ (s)

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