PH Dependence
The pH dependence is given by the factor -0.059m/n per pH unit, where m relates to the number of protons in the equation, and n the number of electrons exchanged. Electrons are always exchanged in electrochemistry, but not necessarily protons. If there is no proton exchange in the reaction equilibrium, the reaction is said to be pH-independent. This means that the values for the electrochemical potential rendered in a redox half-reaction, whereby the element/s in question change/s oxidation state are the same whatever the pH conditions under which the procedure is carried out.
Read more about this topic: Frost Diagram
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