A substance with a pH of 3 is called

A substance with a pH of 3 is called an acidic substance.

Explanation:

The pH —which means potential hydrogen— depends on the concentration of hydrogen present in a compound, establishing which substances are acid, base or neutral.

The chemical expression of pH is:

pH = -㏒₁₀ αH⁺

where α is the activity of hydrogenions.

The pH is in a scale that goes from 1 to 14, where 7 is neutral, less than 7 is acid and greater than 7 corresponds to an alkaline or basic substance. A substance with a pH of 3 is acidic, which would correspond to the pH of lemon juice or vinegar.

i'm pretty sure it's spores