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MHT CET2007ChemistryElectrochemistry

EMF of hydrogen electrode in term of pH is (at 1 atm pressure).

Options

  1. AE_ H ₂ = R T F pH
  2. BE_ H ₂ = R T F 1 pH
  3. CE_ H ₂ = 2.303 RT F pH
  4. DE_ H ₂ =-0.591 pH

Correct answer

D. E_ H ₂ =-0.591 pH

Step-by-step solution

2 H ⁺+2 e⁻ H ₂ According to Nernst equation, aligned E &=E^ + 0.0591 n 1 [ H ⁺ ]² E &=0- 0.0591 2 [ H ⁺ ]² &=-0.0591 pH aligned

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