The optimal pH for catalase is neutral. Therefore, in experiment 5.4, in which tube would you expect the most bubbles to form?
O Tube 1. pH 3
O Tube 2, pH 7
O Tube 3, pH 11
pH 7.5 seems to be the optimum pH for electron transfer between catalase and hydrogen peroxide. The highest catalase activity at this pH was visibly observed by the abundant generation of oxygen at the electrode surface, which agrees with the O2 generation reaction described in Equation 4.
