ElectrochemistryHard
Question
A hydrogen electrode is immersed in a solution with pH = 0 (HCl). By how much will the potential (reduction) change if an equivalent amount of NaOH is added to the solution. (Take pH2 = 1 atm) T = 298 K.
Options
A.increase by 0.41V
B.increase by 59 mV
C.decrease by 0.41V
D.decrease by 59 mV
Solution
pH changes from 0 to 7.
∴ [H+] changes from 1 to 10-7 M.
Accordingly Ered. decreases by 0.059 log 10-7 i.e. 0.059 × (-7) = - 0.41 volt.
∴ [H+] changes from 1 to 10-7 M.
Accordingly Ered. decreases by 0.059 log 10-7 i.e. 0.059 × (-7) = - 0.41 volt.
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