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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 situation is reversed for bases. If a solution contains more hydroxide ion than hydrogen ion, it is said to be basic, and its pH is higher than 7. Remember that bases dissociate (break apart) into hydroxide ions and a positive ion. The hydroxide ions can combine with H(+) to create water.