
pH - Wikipedia
In chemistry, pH (/ piːˈeɪtʃ / 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 specify …
PH | Definition, Uses, & Facts | Britannica
May 16, 2025 · 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? The pH Formula & Equation - ChemTalk
This article explains the concept of pH, how to find and calculate the pH, and how the pH formula and pH equation are used in chemistry!
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 …
What Is pH and What Does It Measure? - ThoughtCo
Jun 10, 2025 · pH is a measure of how acidic or basic a solution is, from 0 to 14. pH is important for chemical reactions in areas like medicine, cooking, and agriculture. Scientists use pH …
What is pH? - BYJU'S
The pH level, or possible level of hydrogen in your body, is determined by the food and type of drink you consume. The pH is the concentration of the hydrogen ions. This calculation is …
15.7: An Introduction to pH - Chemistry LibreTexts
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 scale, a change …
What Does PH Mean? | Understanding Acidity Levels
pH is an acronym for "potential of hydrogen," which refers to the concentration of hydrogen ions (H⁺) in a solution. The scale ranges from 0 to 14: A pH of 7 is considered neutral. Values …
What is pH? - US EPA
Nov 4, 2024 · The pH scale measures how acidic or alkaline a substance is. The scale ranges from 0 to 14. A pH of 7 is neutral. A pH less than 7 is acidic, and a pH greater than 7 is basic. …
How to Calculate pH - Formula and Examples
Jul 21, 2020 · To calculate pH, take the log of the hydrogen ion concentration and change the sign of the answer. In chemistry, pH is a number that acidity or basicity (alkalinity) of an …