Why is the pH scale 0-14?
The pH of a solution is calculated as the negative base-10 logarithm of the hydronium ion (
Example 1: A 0.01 M solution of HCl (a strong acid that completely dissociates to
pH = -log(0.01) = 2.0
Example 2: A 1.0 M solution of HCl has a pH of
pH = -log(1.0) = 0.0
Example 3: A 2.0 M solution of HCl has a pH of
pH = -log(2.0) = -0.30