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EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > PH
Definition:
A measure of the alkaline or acid strength of a substance. pH is defined
as the logarithm of the reciprocal of the hydrogen ion concentration of
a solution.  
Reference:
Adapted from: Porteous, A. 1996. Dictionary of Environmental Science and
Technology, Second Edition. John Wiley and Sons. p. 413.
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