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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
The pH of aqueous solutions can be measured with a glass electrode and a pH meter or a color-changing indicator Measurements of pH are important in chemistry, agronomy, medicine, water treatment, and many other applications
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
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)
What is pH? - US EPA
What is pH? Acidic and alkaine (or "basic") are two extremes that describe substances, usually liquids or chemicals, just like hot and cold are two extremes that describe temperature A substance that is neither acidic nor alkaline is neutral The pH scale measures how acidic or alkaline a substance is The scale ranges from 0 to 14
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!
pH Scale - pH | Dilution | Concentration - PhET Interactive Simulations
Test the pH of things like coffee, spit, and soap to determine whether each is acidic, basic, or neutral Visualize the relative number of hydroxide ions and hydronium ions in solution
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
PH Scale: Acids, Bases, and Common Materials
The pH scale measures how acidic or basic (alkaline) a substance is It ranges from 0 to 14 A pH of 7 is neutral Values below 7 are acidic, and values above 7 are basic Pure water has a neutral pH of 7 When substances dissolve in water, they can shift the pH
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
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 …

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