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 Hydrogen Carbonate
Chemical formula: KHCO3
Also known as: potassium acid carbonate, kalicinite
Potassium Hydrogen Carbonate is Mildly Basic
At concentration of 1 mM, it has a pH of 8.27
At concentration of 10 mM, it has a pH of 8.25
At concentration of 100 mM, it has a pH of 8.13