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 Silicic Acid
Chemical formula: H4SiO4
Silicic Acid is Mildly Acidic
At concentration of 1 mM, it has a pH of 6.4
At concentration of 10 mM, it has a pH of 6.26
At concentration of 100 mM, it has a pH of 6.26