a measure of the acidity or alkalinity of a solution expressed as pH. See pH.
(1) A measure of acidity/alkalinity of a solution. (2) Mathematically is equal to the negative logarithm of the molar concentration of hydrogen ion; measurement of acidity/alkalinity of a solution; pH less than 7 = acidic; above 7 = basic.
The concentration of hydrogen ions in moles per liter of solution; often expressed as pH. (See pH.)
the number of moles of hydrogen ions per cubic decimeter
Moles of hydrogen ions per mole of liquid.
The concentration of hydrogen ions, reported in moles per liter of solution, used as a measure of the acidity of the solution.