This little website shows you the pH of various acids, bases, food products, bodily fluids, cleaners, and more!
Here's a random substance:
pH of Potassium Hydroxide
Chemical formula: KOH
Also known as: Caustic potash, Lye, Potash lye, Potassia, Potassium hydrate
Potassium Hydroxide is Basic
At concentration of 1 mM, it has a pH of 10.98
At concentration of 10 mM, it has a pH of 11.95
At concentration of 100 mM, it has a pH of 12.88