I was taught in class that a positive large half cell potential generally meant that the reaction was more favorable. What exactly does this mean? Doesn't a reaction with potential 4V need a greater input of energy to occur? Meaning that a lower electron cell potential would occur first and is therefore more favorable?
Also how why does Zn(II) +2e- ---> Zn favor the left side of the reaction? Shouldn't Zinc naturally tend towards being neutral?