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ph 音标拼音: [p'i'etʃ]

n. ph值

ph值

WordNet (r) 3.0 (2006) (WordNet)

pH
n 1: (from potential of Hydrogen) the logarithm of the
reciprocal of hydrogen-ion concentration in gram atoms per
liter; provides a measure on a scale from 0 to 14 of the
acidity or alkalinity of a solution (where 7 is neutral and
greater than 7 is more basic and less than 7 is more
acidic); [synonym: {pH}, {pH scale}]

The Free On-line Dictionary of Computing (foldoc)

The {country code} for the Philippines.

(1999-01-27)

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pH值 - 维基百科，自由的百科全书
1909年，丹麦化学家瑟伦·索伦森在嘉士伯实验室 [3] 引入了pH的概念，最初使用符号“p H• ”，以H•作为小写p的下标。这个概念后来于 1924 年被修改为现代 pH 值，以适应电化学电池的定义和测量。对于符号p，我建议将其命名为“氢离子指数”并使用符号p H• 。
PH | Definition, Scale, Uses, Examples, Facts | Britannica
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 concentration of the hydrogen ion into numbers between 0 and 14
What Is pH? - Definition, Uses, Facts - Science Notes and Projects
Key Takeaways: What Is pH? 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, values below 7 are acidic, and values above 7 are basic (alkaline)
‪pH Scale: Basics‬ - PhET Interactive Simulations
Explore the basics of pH scale with interactive simulations to understand acidity and alkalinity in various solutions
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
The pH Scale - Chemistry LibreTexts
Because of the difficulty in accurately measuring the activity of the H A + ion for most solutions the International Union of Pure and Applied Chemistry (IUPAC) and the National Bureau of Standards (NBS) has defined pH as the reading on a pH meter that has been standardized against standard buffers
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!
pH Scale: Acids, bases, pH and buffers (article) | Khan Academy
The pH scale is often said to range from 0 to 14, and most solutions do fall within this range, although it’s possible to get a pH below 0 or above 14 Anything below 7 0 is acidic, and anything above 7 0 is alkaline, or basic
pH 值 · ChemWiki
pH 值 pH 值，即氢离子浓度指数，可以用于表示酸碱性。通常情况下（25 ° C 25°C, 298 15 K 298 15K），当 pH 小于 7 的时候，溶液呈酸性，当 pH 大于 7 的时候，溶液呈碱性，当 pH 等于 7 的时候，溶液为中性。定义 p H = l o g 10 [H +] pH = −log10[H +]
pH and Water | U. S. Geological Survey - USGS. gov
pH is a measure of how acidic basic water is The range goes from 0 to 14, with 7 being neutral pHs of less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base

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