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 ?
35 on the 0-14 pH scale, while alkalosis means the systemic pH is above 7.
The term pH refers to the "power of Hydrogen" and the pH scale ranges from 0 to 14.
The pH scale indicates how acidic or basic a solution is by giving the concentration of hydrogen ions.
The students wrestled with the pH scale of acids and bases in the "Acid Rain" unit.
The pH scale can determine presence of additional contaminants which are not detected by halogenide testing (such as sulfates and nitrates), and can corroborate halogenide surface concentrations measured.
Think of the pH scale as a "Richter Scale of Acidity," but without the openendedness of the earthquake scale.
The acidity of water is measured on a pH scale, ranging from zero (maximum acidity) to 14 (maximum alkalinity).
The pH scale contains 14 divisions known as pH units.
As carbon dioxide levels have risen, the average pH level in the ocean, an indicator of acidity, has dropped (on the pH scale, a lower number means more acidity).
The building has been designed to complement the neighbouring Grade II listed building, and features coloured glass fins that represent the pH scale to symbolise the scientific function of the building.
Which number on the pH scale indicates neutral acidity and alkalinity?