What pressure (bar) of H 2 would be required to make emf of hydrogen electrode zero in pure water at 2 5 ∘ C ?

Question

What pressure (bar) of H 2 ​ would be required to make emf of hydrogen electrode zero in pure water at 2 5 ∘ C ?

TestHub · Accepted Answer

​ 2 e − + 2 H + ( aq ) → H 2 ​ ( g ) E = E ∘ − n 0.059 ​ lo g [ H + ] 2 P H 2 ​ ​ ​ 0 = 0 − 2 0.059 ​ lo g ( 1 0 − 7 ) 2 P H 2 ​ ​ ​ lo g ( 1 0 − 7 ) 2 P H 2 ​ ​ ​ = 0 1 0 − 14 P H 2 ​ ​ ​ = 1 P H 2 ​ ​ = 1 0 − 14 bar ​

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