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PH Indicators Liquid acid-base indicators are weak organic acids or bases that present as different colors in their acid and base forms. An indicator has a specific pH range over which it changes from its acid form to its base form. ... This method of measuring pH is quick, inexpensive, and easy.
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Liquid acid-base indicators are weak organic acids or bases that present as different colors in their acid and base forms. An indicator has a specific pH range over which it changes from its acid form to its base form. ... This method of measuring pH is quick, inexpensive, and easy.