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The pH scale
was developed as a more convenient way to express H3O+ concentration.
pH = − log[H+] = − log[H3O+]
pH range from
1-14
pH < 7
Acidic Solution
pH = 7
Neutral Solution
pH > 7
Basic Solution
The H3O+ concentration can be determined by taking the inverse log of the negative pH.
[H3O+] = 10-pH