pH
level of acidity (tested by checking the concentration of hydrogen ions in a solution by using indicators or electrodes)
Ph (phenyl)
n.
group of chemical compounds derived from benzene (Chemistry)
PH
pH is a measure of the
acidity or
alkalinity of a solution. Aqueous solutions at 25 ℃ with a pH less than seven are considered acidic, while those with a pH greater than seven are considered basic (alkaline). The pH of 7.0 is defined as 'neutral' at 25 ℃ because at this pH the concentration of
H3O+ equals the concentration of
OH− in pure water. pH is formally dependent upon the
activity of
hydronium ions (H3O+), but for very dilute solutions, the
molarity of H3O+ may be used as a substitute with little loss of accuracy. (H+ is often used as a synonym for H3O+.) Because pH is dependent on ionic activity, a property which cannot be measured easily or fully predicted theoretically, it is difficult to determine an accurate value for the pH of a solution. The pH reading of a solution is usually obtained by comparing unknown solutions to those of known pH, and there are several ways to do so.
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ph
pH
Noun
1. (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)
(synonym) pH scale
(hypernym) hydrogen ion concentration
(hyponym) acidity
(classification) chemistry, chemical science
pH (pH Wert)
PH, level of acidity (tested by checking the concentration of hydrogen ions in a solution by using indicators or electrodes)
pH (parallel Haskell)
PH, parallel Haskell
ph (pädagogische Hochschule)
teachers training center, place where people are prepared for careers as teachers
Ph (phenyl)
Ph, phenyl, group of chemical compounds derived from benzene (Chemistry)
pH (potentiel hydrogène)
PH, level of acidity (tested by checking the concentration of hydrogen ions in a solution by using indicators or electrodes)
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