pH is a measure of how acidic or basic a substance is. It takes a numerical value between 0 and 14 that measures the relative amount of free hydrogen and hydroxyl ions in water. Water having more hydrogen ion concentration than hydroxyl is acidic.

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 —which ordinarily ranges between about 1 and 10 −14 gram-equivalents per litre—into numbers between 0 and 14.

2020年9月30日 · The pH scale shows how acidic or basic a chemical is in aqueous solution (mixed with water). The scale runs from 0 (most acidic) to 14 (most alkaline or basic), where 7 is neutral pH. Chemicals with pH values from 0 up to 7 are acids, those with a pH value of 7 are neutral, and those with pH values greater than 7 up to 14 are bases.

The pH scale measures how strongly acidic or alkaline a solution is using a set of values from pH 0 to pH 14. When pure water is dropped into a solution of universal...

2020年2月24日 · The pH scale is the worldwide standard for measuring acidity, or equivalently, alkalinity (also called basicity). The abbreviation pH stands for "potential of hydrogen ion." The scale ranges from 0 for a 1M solution of hydrogen (H+) ions to 14 for a …

The pH scale is a measurement of the acidic or basic behaviour of the aqueous solution. It clearly denotes the compounds as acidic and basic, when these have pH between 0-6 and 8-14, respectively.

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.

2025年1月28日 · What is the pH Scale? The pH scale helps us measure the acidity, basicity or neutrality of a solution on a scale of 0 to 14, with 7 being the neutral marker. With this, a pH above 7 is basic, while a pH below 7 is acidic.

The pH scale is used to measure how acidic or basic a substance is. The pH of an acid is less than 7, and that of a base is greater than 7.

A measure of the degree of the acidity or the alkalinity of a solution as measured on a scale (pH scale) of 0 to 14. The midpoint of 7.0 on the pH scale represents neutrality, i.e., a "neutral" solution is neither acid nor alkaline. Numbers below 7.0 indicate acidity; numbers greater than 7.0 indicate alkalinity.