1. The problem statement, all variables and given/known data Why is this true? Why is it that the reduction of oxygen is more favored in acidic solution rather than in basic solution? 2. Relevant equations Acids are proton donors. 3. The attempt at a solution Does this have anything to do with the fact that the reduction of oxygen is in part a protonation reaction? In other words, what I'm seeing is simply that protonation is more favored in acidic media than in basic media?