Final answer:
For a reaction dependent on protons, the reaction will shift by approximately +0.05916 V for every unit change in pH.
Step-by-step explanation:
In a reaction dependent on protons, the pH of the solution plays a crucial role. The shift in the reaction for every unit change in pH can be determined using a special equation called the Nernst equation. According to the equation, for every unit change in pH, the reaction potential (E) will shift by approximately +0.05916 V. Therefore, the correct answer is option b) +0.05916 V.