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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+)
pH is a scale from about 0 to 14 that measures how acidic or basic a solution is. A pH less than 7 is considered acidic, and acidity increases as the pH decreases. A pH gr â¦ eater than 7 is considered basic, and basicness increases as pH increases, up to 14.