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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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英文字典中文字典相关资料:

pH - Wikipedia
In chemistry, pH ( piːˈheɪtʃ or piːˈeɪtʃ ; pee-AYCH) is a logarithmic scale used to specify the acidity or basicity of aqueous solutions Acidic solutions (solutions with higher concentrations of hydrogen (H+) cations) are measured to have lower pH values than basic or alkaline solutions While the origin of the symbol 'pH' can be traced back to its original inventor, and the 'H
What Is pH? - Definition, Uses, Facts - Science Notes and Projects
What is pH? Learn the pH definition, scale, calculations, and uses in science, with examples, misconceptions, and FAQs
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
Understanding the pH Scale: Definitions, Calculations, and Concepts
The pH scale is based on powers of 10 That’s what logarithmic means In the middle of the scale is a pH of 7 At this pH, the concentration of both H 3 O + and OH - is 1 0x10 -7 M With equal concentrations of the two opposing ions, the solution is neutral For pH values below 7, the [H 3 O +] is greater than [OH -] and the solution is acidic
pH Scale: Definition, Chart, Values, Range - Chemistry Learner
pH is a scale used to measure the acidity or basicity of a solution It ranges from 0 to 14 and reflects the relative concentration of hydrogen ions (H⁺) and hydroxide ions (OH⁻) in aqueous solutions
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!
Acids, bases, pH, and buffers - Khan Academy
Acidity and basicity, proton concentration, the pH scale, and buffers
A primer on pH - NOAA Pacific Marine Environmental Laboratory (PMEL)
Common misconceptions about pH and ocean “acidification” How scientists describe the percent change in acidity If you add acid to a solution the concentration of hydrogen ions (acidity) increases and the pH decreases Frequently people confuse pH with acidity—pH is the scale on which acidity is expressed, but it is not synonymous with
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 in …
pH Overview (Video FAQ) - Mometrix Test Preparation
pH (potential hydrogen) is a measure of how acidic or basic an aqueous solution is based on the number of hydrogen ions Learn more about pH levels here!

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