Definition of PH scale
1. Noun. (from potential of Hydrogen) the logarithm of the reciprocal of hydrogen-ion concentration in gram atoms per liter; provides a measure on a scale from 0 to 14 of the acidity or alkalinity of a solution (where 7 is neutral and greater than 7 is more basic and less than 7 is more acidic).
Generic synonyms: Hydrogen Ion Concentration
Specialized synonyms: Acidity, Alkalinity, Neutrality
Category relationships: Chemical Science, Chemistry
Medical Definition of PH scale
1. The negative logarithm of the hydrogen ion concentration, used as a scale for expressing acidity and alkalinity. See: pH. Synonym: pH scale. (05 Mar 2000)
Lexicographical Neighbors of PH Scale
Literary usage of PH scale
Below you will find example usage of this term as found in modern and/or classical literature:
1. The Determination of Hydrogen Ions: An Elementary Treatise on the Hydrogen by William Mansfield Clark (1920)
"THE pH SCALE When "acidity" wao resolved into its two components the normality unit was retained for each. As a normal solution of an acid had been defined ..."
2. Environmental Progress and Challenges: EPA's Update by DIANE Publishing Company (1997)
"Lemon Juice "Pure" Rain (5.6) Baking Soda Vinegar Distilled Water 10 11 12 13 14 The pH scale ranges from 0 to 14. A value of 7.0 is neutral. ..."
3. Science by American Association for the Advancement of Science (1922)
"... equilibria on the rH scale gives a picture of oxidation reduction indicators comparable with that of the acid base indicators plotted on the pH scale. ..."