pH

Chemistry Concepts

pH is a logarithmic scale used in chemistry to specify the acidity or basicity of aqueous solutions. It inversely indicates hydrogen cation activity. At 25 °C, solutions below pH 7 are acidic, those above pH 7 are basic, and pH 7 is neutral. Although the common range is 0 to 14, values outside it are possible for very concentrated strong acids or bases. pH can be measured using electrodes, a pH meter, or indicators.

Type: Logarithmic scale for aqueous acidity or basicity
Neutral value at 25 °C: pH 7
Measurement methods: Glass electrode and pH meter, or color-changing indicator

Sources and credits

Article: PH (English Wikipedia)
Wikidata: Q40936
Text: Card text is adapted from the English Wikipedia article by an automated summary. Wikipedia content is available under CC BY-SA 4.0; see the article history for its contributors. CC BY-SA 4.0 · Article history and contributors
Illustration: By Alvy16. CC BY 4.0 · File page on Wikimedia Commons
Alvy16, Own work
Modifications: Resized and converted to WebP
Popularity: 1,071 median daily views (Wikimedia Pageviews API (all-access, user agent))

Kosmora is not affiliated with or endorsed by the Wikimedia Foundation.