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 the acidity or basicity of aqueous solutions.

2025年2月3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.

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!

2024年8月15日 · The term "pH" is a measure of hydrogen ion concentration, a quantitative measure of the acidity or alkalinity of a solution. In chemistry, the pH scale usually ranges from 0 to 14. Aqueous solutions at 25°C with a pH of less than 7 are acidic, while those with a pH greater than 7 are basic or alkaline.

a measure of acidity and alkalinity of a solution that is a number on a scale on which a value of 7 represents neutrality and lower numbers… See the full definition

2023年4月20日 · Define pH and acidic, basic, and neutral pH values. Determine the magnitude of change in [H 3 O +] for changing pH values.

2022年12月17日 · The term “pH” stands for “potential of hydrogen,” and it is a unit of measurement for the concentration of hydrogen ions in a solution. The concept of pH was first introduced by the Danish chemist Søren Peder Lauritz Sørensen at the Carlsberg Laboratory in 1909. pH is defined as the negative logarithm of the concentration of H+ ions.

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.

What is pH? pH Definition. pH is defined as the negative logarithm of H + ion concentration. Hence the meaning of the name pH is justified as the power of hydrogen. We know that all the acids and bases do not react with the same chemical compound at the same rate. Some react very vigorously, some moderately while others show no reaction.

pH definition: 1. a number that shows how strongly acid or alkaline a substance is, in a range from 0 to 14: 2. a…. Learn more.