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Spec 20 Instructions
The Standard Curve


The pH of a solution is a measure of its acidity. The pH is defined as the negative log of the hydrogen ion concentration. The pH scale ranges from 0 to 14 where 0 is the most acidic, 14 is the most basic, and 7 is neutral.

Remember that since pH is a log scale, the difference between any two numbers is a factor of 10, so precise measurement of pH is very important. In the lab, pH can be measured with a pH meter or pH paper.

pH values of some familiar substances (from Purves et al 1998)


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Created by: Cecilia Yu '07
Maintained by: CarolAnn Paul
Date Created: July 1, 2004
Last Modified: August 25, 2004
Page Expires: August 6, 2006|