History of PH

	Revision 2 . . October 31, 2001 8:24 pm by Gareth Owen
	Revision 1 . . October 31, 2001 8:08 pm by Ddroar

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Difference (from prior major revision) (no other diffs)

Changed: 1,2c1

pH A measure of the concentration of protons (H+) in a solution.

A measure of the concentration of protons (H+) in a solution and, therefore, its acidity or alkalinity.