Toothpaste will turn universal indicator paper blue indicating a pH value of 9, which is a weak alkali. A universal indicator is used. It gives different colours at different pH values in a ...

Aesthetically, it's a prime candidate for jungle warfare. The PH-9 Predator Armor can be acquired from the Super Credits Store. It's not always available for purchase as each round of armor ...

Catalase has an optimum pH of 9 and a working range of between pH 7-11. Most other enzymes function within a working pH range of about pH 5-9 with neutral pH 7 being the optimum.