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 Carbonic Acid
Chemical formula: H2CO3
Also known as: Carbon dioxide solution, Dihydrogen carbonate, Acid of air, Aerial acid, Hydroxymethanoic acid
100 mM
Saturated
10 mM
1 mM
Carbonic Acid is Acidic
At concentration of 1 mM, it has a pH of 4.68
At concentration of 10 mM, it has a pH of 4.18
At concentration of 100 mM, it has a pH of 3.68
At concentration of Saturated, it has a pH of 3.8