pH scale

Noun

1.

pH scale - (chemistry) p(otential of) H(ydrogen); 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 acidic and less than 7 is basic) Synonyms: pH

acidity, alkalinity, chemical science, chemistry, hydrogen ion concentration, neutrality, pH