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  1. 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 …

  2. 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 …

  3. 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!

  4. 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 …

  5. 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 …

  6. pH | US EPA

    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 = …

  7. 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 …

  8. 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 …

  9. pH as a Measure of Acid and Base Properties

    pH as a Measure of Acid and Base Properties

  10. 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 …