Answer
If the [H+] > [OH-] the substance is classified as an acid.
Explanation
Acids increase the number of hydrogen ions (H⁺) in a solution (there are more hydrogen ions than hydroxide ions) and the resulting solution is said to be acidic.
Bases increase the number of hydroxide ions (OH⁻) (there are more hydroxide ions than hydrogen ions) and the resulting solution is said to be basic or alkaline.
When [H⁺] > [OH⁻], it implies the solution is acidic and when [H⁺] < [OH⁻]
So If the [H+] > [OH-] the substance is classified as an acid.
