pH - Wikipedia
In chemistry, pH (/ piːˈheɪtʃ / or / piːˈeɪtʃ /; pee-AYCH) is a logarithmic scale used to specify the acidity or basicity of aqueous solutions. Acidic solutions (solutions with higher concentrations of hydrogen (H+) …
PH | Definition, Scale, Uses, Examples, & Facts | Britannica
Dec 5, 2025 · A pH value is the 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 the …
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 meters and …
pH Scale: Acids, bases, pH and buffers (article) | Khan Academy
Acidity and basicity, proton concentration, the pH scale, and buffers.
What Is pH? - Definition, Uses, Facts - Science Notes and Projects
Aug 2, 2025 · pH measures the concentration of hydrogen ions (H⁺) in a solution and indicates whether a solution is acidic, neutral, or basic. The pH scale typically ranges from 0 to 14, where 7 is neutral, …
What is pH? - US EPA
Nov 4, 2025 · What is pH? Acidic and alkaine (or "basic") are two extremes that describe substances, usually liquids or chemicals, just like hot and cold are two extremes that describe temperature. A …
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!
Understanding the pH Scale: Definitions, Calculations, and Concepts
Explore the meaning of pH and how it relates to acidity and basicity. Learn how to calculate pH, pOH, [H₃O⁺], and [OH⁻], and understand what pH tells you about a solution.
What Is pH? A Free Explanation of the pH Scale - Biology Insights
Jul 23, 2025 · pH is a fundamental measurement in chemistry, indicating how acidic or alkaline a substance is. It provides a standardized, numerical value to describe the chemical nature of …
pH Scale: Definition, Chart, Values, & Range - Chemistry Learner
pH is a scale used to measure the acidity or basicity of a solution. It ranges from 0 to 14 and reflects the relative concentration of hydrogen ions (H⁺) and hydroxide ions (OH⁻) in aqueous solutions.