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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+)
When a strong acid and a strong base fully neutralize, the pH is neutral. Neutral pH means that the pH is equal to 7.00 at 25 degrees Celsius. At this point of neutralization, there are equal amounts of OHâ and H3O+. There is no excess NaOH. The solution is NaCl at the equivalence point.