All Tubes were incubated for 20 seconds and filled with wate…

All Tubes were incubated for 20 seconds and filled with water catalase and hydrogen peroxide in equal concentrations. In addition TUBE 1: one drop of HCl was added TUBE 2: one drop of NaOH was added TUBE 3: no additional drops were added Which tube(s) would demonstrate an optimum pH range for the enzyme?