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When pH is 1, 2 3 4 5 or 6, it is considered an Acid. When pH is 8 9 10 11 12 13 or 14, it is considered a Base. 7 is the neutral point of acid and base. pH is calculated by the -log (H+)
The pH scale ranges from 0-14. A pH of 0-7 is considered acidic. The lower the pH, the stronger the acid. So a pH of perhaps 0-2 would be a strong acid while a pH closer to 7 â¦ may be considered a weak acid.