Calculate the potential of hydrogen electrode in contact with a solution whose pH is 10

Q3.4: Calculate the potential of hydrogen electrode in contact with a solution whose pH is 10.

Solution:

For hydrogen electrode, ,

given that      pH = 10

use formula [H⁺] = 10^–pH

so that  [H⁺] = 10⁻¹⁰M

Electrode reaction will

H⁺  + e ^–  →1/2 H₂

Use the formula