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 Carbonate
Chemical formula: K2CO3
Also known as: Carbonate of potash, Dipotassium carbonate, Sub-carbonate of potash, Pearl ash, Potash, Salt of tartar, Salt of wormwood
Potassium Carbonate is Basic
At concentration of 1 mM, it has a pH of 10.52
At concentration of 10 mM, it has a pH of 11
At concentration of 100 mM, it has a pH of 11.36
At concentration of 0.1, it has a pH of 11.5