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 specify the acidity or basicity of aqueous solutions.
pH - Simple English Wikipedia, the free encyclopedia
pH is a measure of the concentration of protons (H +) in a solution. S.P.L. Sørensen introduced this concept in the year 1909 . The p stands for the German potenz , meaning power or concentration, and the H for the hydrogen ion (H + ).
PH | Definition, Uses, & Facts | Britannica
2024年12月9日 · 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 the concentration of the hydrogen ion into numbers between 0 and 14. Learn more about pH.
What Is pH and What Does It Measure? - ThoughtCo
2019年5月6日 · 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). Typically, values of pH range from 0 to 14, although very strong acids may have a negative pH , while very strong bases may have a pH exceeding 14.
pH Definition and Equation in Chemistry - ThoughtCo
2024年8月15日 · What is pH? Here's the definition of pH in chemistry, with examples of acidic and alkaline values of common household products and lab chemicals.
Learn What pH Stands For and How the Term Originated
2019年5月3日 · pH is the negative log of hydrogen ion concentration in a water-based solution. The term "pH" was first described by Danish biochemist Søren Peter Lauritz Sørensen in 1909. pH is an abbreviation for "power of hydrogen" where "p" is short for the German word for power, potenz and H is the element symbol for hydrogen .
pH indicator - Wikipedia
A pH indicator is a halochromic chemical compound added in small amounts to a solution so the pH (acidity or basicity) of the solution can be determined visually or spectroscopically by changes in absorption and/or emission properties. [1]
PH (disambiguation) - Wikipedia
pH is a measure of acidity or alkalinity. PH, ph, pH, and Ph may also refer to: Philippines (ISO country code PH), a country located in Southeast Asia
The pH Scale - Chemistry LibreTexts
2023年1月30日 · 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 than a pH of 4. Likewise, a pH of 3 is one hundred times more acidic than a pH of 5. Similarly a pH of 11 is ten times more basic than a pH of 10.
PH - Wikiversity
The PH scale. A quantity called the pH is a scale that is used to compare the relative strength of acids and bases. Generally speaking the pH of a substance can range from anywhere between 0 and 14.