Mini-Encyclopedia of Papermaking Wet-End
Part Two: Definitions and Concepts
The acidity or "total acidity" of an aqueous mixture equals the amount of strong base (such as NaOH) required to raise the pH of a unit volume or mass of sample to a value of 8.3. In general we cannot estimate a sample's total acidity by knowing its pH. Mixtures that contain weak acids such as alum tend to have high values of total acidity.
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