TERMIUM Plus®

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PH SCALE [1 record]

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Alphabetical list of terms

Record 1 2011-08-03

English

Subject field(s)
  • Metrology and Units of Measure
CONT

A common measure of acidity is pH, which is defined as the negative logarithm of the hydrogen-ion concentration. The pH scale ranges from 0 to 14, with a value of 7 representing a solution that is neutral, values below 7 indicating greater acidity and values above 7 indicating greater alkalinity.

CONT

... the pH scale is a logarithmic scale; a substance with a pH of 4 is more than twice as acid as a substance with a pH of 5. Similarly, a substance with a pH of 9 is much more than twice as alkaline as a substance with a pH of 8.

French

Domaine(s)
  • Unités de mesure et métrologie
CONT

L'échelle des pH s'étend de 0 (acidité forte) à 14 (base forte), une solution de pH = 7 étant neutre.

Spanish

Campo(s) temático(s)
  • Metrología y unidades de medida
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