(documentationpotentialOfHydrogenEnglishLanguage "(potentialOfHydrogen ?SOLUTION ?NUMBER) means that the Solution ?SOLUTION has a pH value of ?NUMBER. The ph varies between 0 and 14, and it is a measure of the acidity or alkalinity of ?SOLUTION. More precisely, and it is the logarithm of the reciprocal of the quantity of AtomGrams of Hydrogen ions.")