ODM2 Controlled Vocabularies Login

pHUnits Type

In chemistry, pH (/pi??e?t?/) is a numeric scale used to specify the acidity or alkalinity of an aqueous solution. It is the negative of the logarithm to base 10 of the activity of the hydrogen ion. Solutions with a pH less than 7 are acidic and solutions with a pH greater than 7 are alkaline or basic. Pure water is neutral, being neither an acid nor a base. Contrary to popular belief, the pH value can be less than 0 or greater than 14 for very strong acids and bases respectively. [Wikipedia: https://en.wikipedia.org/wiki/PH]

Term

pH

Category

Chemistry

Provenance

QUDT-WQ

Provenance Uri

http://environment.data.gov.au/def/unit/pH

Note

-

Default Unit

pH

Dimension Symbol

U1

Dimension Length

1

Dimension Mass

0

Dimension Time

0

Dimension Current

0

Dimension Temperature

0

Dimension Amount

0

Dimension Light

0