P.H.

Public Health.

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pH,

a symbol used (with a number) to indicate acidity or alkalinity in testing soils for suitability to specific crops, in analyzing body secretions, and in various industrial applications. It represents the relative concentration of hydrogen ions (in gram atoms per liter) in a given solution, usually determined by the use of a substance (indicator) known to change color at a certain concentration. The pH common scale ranges from 0 to 14, pH7 (the hydrogen-ion concentration, 10^―7 or.0000001, in pure water) being taken as neutral, 6 to 0 increasingly acid, and 8 to 14 increasingly alkaline. Most soils range between pH3 and pH10.

ph.,

1. phase.

2. phone.

3. phosphor.

Ph (no periods),

Chemistry. phenyl.

P.H.,

Purple Heart.