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The Epic Interactive Encyclopedia 1998
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Epic Interactive Encyclopedia, The - 1998 Edition (1998)(Epic Marketing).iso
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1992-09-02
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13 lines
A scale for measuring acidity or alkalinity.
A pH of 7.0 indicates neutrality, below 7 is
acid, while above 7 is alkaline. The scale
runs from 0 to 14. Strong acids, as used in
car batteries, have a pH of about 2; acidic
fruits such as citrus fruits are about pH 4.
Fertile soils have a pH of about 6.5 to 7.0,
while weak alkalis such as soap are 9 to 10.
Corrosive alkalis such as lye are pH 13. The
pH value of a solution equals the negative
logarithm of the concentration of hydrogen
ions.