
pH - Wikipedia
In chemistry, pH (/ p iː ˈ eɪ tʃ / pee-AYCH), also referred to as acidity or basicity, historically denotes "potential of hydrogen" (or "power of hydrogen"). [1] It is a logarithmic scale used to …
PH | Definition, Uses, & Facts | Britannica
Dec 9, 2024 · PH, quantitative measure of the acidity or basicity of aqueous or other liquid solutions. The term, widely used in chemistry, biology, and agronomy, translates the values of …
What Is pH and What Does It Measure? - ThoughtCo
May 6, 2019 · pH describes how acidic or basic an aqueous solution is, where a pH below 7 is acidic and a pH greater than 7 is basic. pH of 7 is considered neutral (e.g., pure water). …
What Is pH? The pH Formula & Equation - ChemTalk
pH is a measure of how basic or acidic a substance is. pH has a range of 0-14. A pH greater than 7 means the substance is basic. A pH less than 7 means the substance is acidic.
pH and Water | U.S. Geological Survey - USGS.gov
Oct 22, 2019 · pH is a measure of how acidic/basic water is. The range goes from 0 to 14, with 7 being neutral. pHs of less than 7 indicate acidity, whereas a pH of greater than 7 indicates a …
pH | US EPA - U.S. Environmental Protection Agency
Feb 7, 2025 · pH is an expression of hydrogen ion concentration in water. Specifically, pH is the negative logarithm of hydrogen ion (H +) concentration (mol/L) in an aqueous solution: pH = …
15.7: An Introduction to pH - Chemistry LibreTexts
Apr 20, 2023 · pH is defined as the negative log of hydrogen ion concentration. It can be used to describe the relative acidity (or basicity) of a solution. Because it is based on a logarithmic …
pH Of Acids And Bases - BYJU'S
pH Chemistry (Acids & Bases) - pH scale shows the range of strengths of acids and alkalis. On this scale, the strongest acid is 0 and the strongest alkali is 14. The universal indicator turns a …
Determining and Calculating pH - Chemistry LibreTexts
Jan 30, 2023 · pH: The term pH refers to the "potential of hydrogen ion." It was proposed by Danish biochemist Soren Sorensen in 1909 so that there could be a more convenient way to …
The pH Scale - Chemistry LibreTexts
Jan 30, 2023 · The pH scale is logarithmic, meaning that an increase or decrease of an integer value changes the concentration by a tenfold. For example, a pH of 3 is ten times more acidic …