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 Calcium Carbonate
Chemical formula: CaCO3
Also known as: Limestone, calcite, aragonite, chalk, marble, pearl, oyster shell
Saturated
1 mM
10 mM
100 mM
Calcium Carbonate is Mildly Basic
At concentration of 1 mM, it has a pH of 9.91
At concentration of 10 mM, it has a pH of 9.91
At concentration of 100 mM, it has a pH of 9.91
At concentration of Saturated, it has a pH of 9.4