pH

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pH

potential of hydrogen; a measure of the acidity or alkalinity of a solution equal to the common logarithm of the reciprocal of the concentration of hydrogen ions in moles per cubic decimetre of solution. Pure water has a pH of 7, acid solutions have a pH less than 7, and alkaline solutions a pH greater than 7

pH

[pē′āch]
(chemistry)
A term used to describe the hydrogen-ion activity of a system; it is equal to -log aH+; here aH+is the activity of the hydrogen ion; in dilute solution, activity is essentially equal to concentration and pH is defined as -log10[H+], where H+is hydrogen-ion concentration in moles per liter; a solution of pH 0 to 7 is acid, pH of 7 is neutral, pH over 7 to 14 is alkaline.

pH(S)

(analytical chemistry)

pH

A measure of the acidity or alkalinity of a solution; numerically equal to 7.0 for a neutral solution; the pH value increases with increasing alkalinity and decreases with increasing acidity. Also See pH value.

PH

1. On drawings, abbr. for phase.
2. Abbr. for phillips head.

phot

A unit of illumination equal to 1 lumen per square centimeter. Abbr. ph.

PH

(tool)
The tool for looking up people in Eudora on the Macintosh. Equivalent to Unix's finger service.

pH

(2)

ph

(networking)
The country code for the Philippines.
References in periodicals archive ?
So be sure to monitor your soil pH levels at least twice a week to keep it balanced, and remember to plant non gmo heirloom seeds so you can grow plenty of delicious and healthy vegetables," the HAGA expert ended his remarks.
5 was significantly more effective than the other pH levels for both shoot production and shoot growth of Almond (Amygdalus communis L.
By using household leachate in the soil the pH level would decrease and the absorbable amount of Cadmium would increase.
A spokesman for disaster crews said that pH levels were at 8-8.
She added that the pH level will normalize by the time the Danube -- Europe's second largest river -- reaches countries downstream, which include Croatia, Serbia, Bulgaria, Romania and Ukraine.
There does appear to be an optimal pH level for drinking water.
The water filtration plant, which uses lime to raise the pH level and a phosphate to inhibit corrosion, allowed the city to treat its water before it entered the system.
Terrazze della Luna IGT Novello, made using Teroldego grapes, was created with a slow but constant ripening process, resulting in a lower pH level and higher acidity.
PoolCop is attached to a swimming pool's filtering system where it automatically backwashes and sanitises the water, monitors and adjusts the pH level, chlorine content, temperature and water level.
As the pH level during the reaction was adjusted upwards to pH = 4, the results for the MAA remained about the same while those for AA showed nearly 80% of the carboxyl groups in the water phase and only about 5% in the interior sections of the particles.