hydrogen ion concentration

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Noun

1.

hydrogen ion concentration - the number of moles of hydrogen ions per cubic decimeter concentration - the strength of a solution; number of molecules of a substance in a given volume pH, pH scale - (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);