AP EAMCET20224 Jul 2022Morning ShiftChemistryElectrochemistryActual
The reduction potential of hydrogen electrode at 25 ° C in a neutral solution is P H 2 = 1 atm
Options
- A0 . 059   V
- B- 0 . 059   V
- C- 0 . 413   V
- D0 . 00   V
Correct answer
C. - 0 . 413   V
Step-by-step solution
Reduction potential of hydrogen electrode can be calculated Using Nernst equation for 2 H + + 2 e - → H 2 E red = E red 0 - 0 . 059 n log p H 2 H + 2 For a neutral solution H + ion concentration is 10 - 7 as pH = 7 E H + | H 2 0 = 0 - 0 . 0591 2 log 1 10 - 7 2                         = 0 - 0 . 0591 2 log 10 14                         = - 0 . 0591 × 14 2 log 10