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 Hydrochloric Acid
Chemical formula: HCl
Also known as: Muriatic acid, Spirits of salt, Hydronium chloride, Chlorhydric Acid
Hydrochloric Acid is Strongly Acidic
At concentration of 1 mM, it has a pH of 3.01
At concentration of 10 mM, it has a pH of 2.04
At concentration of 100 mM, it has a pH of 1.08
At concentration of N, it has a pH of 0.1