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Question

A hydrogen electrode placed in a buffer solution of CH3COONa and acetic acid in the ratio's x:y and y:x has electrode potential values E1 volts and E2 volts respectively at 25oC. The pKa values of acetic acid is (E1 & E2 are oxidation potential).

  1. fraction numerator E subscript 1 end subscript plus E subscript 2 end subscript over denominator 0.118 end fraction    
  2. fraction numerator E subscript 2 end subscript minus E subscript 1 end subscript over denominator 0.118 end fraction 0    
  3. negative fraction numerator E subscript 1 end subscript plus E subscript 2 end subscript over denominator 0.118 end fraction    
  4. fraction numerator E subscript 1 end subscript minus E subscript 2 end subscript over denominator 0.118 end fraction 0    

The correct answer is: fraction numerator E subscript 1 end subscript plus E subscript 2 end subscript over denominator 0.118 end fraction

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