pH definition

Gives the acidity of an aqueous solution as the negative base-10 logarithm of the hydrogen ion concentration. It is used in chemistry and biology to express how acidic or basic a solution is.

\mathrm{pH} = -\log_{10}[\mathrm{H}^{+}]

What the symbols mean

acidity of the solution (dimensionless)
molar concentration of hydrogen (lyonium) ions in mol/L

About this formula

  • FieldChemistry
  • TopicAcid-base chemistry
  • LevelHigh school
  • Also calledpotential of hydrogen, pH value, pH formula, hydrogen ion concentration logarithm, acidity formula, negative log of hydrogen ion concentration
  • SourceWikidata Q40936

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