英语词汇“pH”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

In chemistry, pH is a measure of how acidic something is. The lower the number on the pH scale, the more acid a substance contains.

The pH scale goes from 0 to 14, with 0 being the most acidic. The higher, low-acid numbers on the pH scale are basic — they feel slippery and have an astringent taste. Substances at around 7, the middle of the pH scale, are neutral, like water. Lemon juice has a pH of 2.2, since it's acidic. pH comes from the German word Potenz, "potency or power," and H, the chemical symbol for hydrogen.

WORD FAMILY

USAGE EXAMPLES

Rasmussen is pursuing a Ph.D in Earth, Environment and Society, a program offered through PSU’s Geography Department.

Washington Times(Dec 16, 2016)

A: Adding lime to a vegetable garden on a yearly basis is generally needed to provide calcium and to raise soil pH.

Seattle Times(Dec 08, 2016)

This gas, acidic when dissolved in water, is also lowering the pH of the world’s sea water—a phenomenon known as ocean acidification.

Economist(Dec 01, 2016)

n (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);

Syn|Hypo|Hyper

pH scale

acidity

pH values below 7

alkalinity

pH values above 7

neutrality

pH value of 7

hyperacidity

excessive acidity

hydrogen ion concentration

the number of moles of hydrogen ions per cubic decimeter

单词	pH
释义	pH (once / 3789 pages) n In chemistry, pH is a measure of how acidic something is. The lower the number on the pH scale, the more acid a substance contains. The pH scale goes from 0 to 14, with 0 being the most acidic. The higher, low-acid numbers on the pH scale are basic — they feel slippery and have an astringent taste. Substances at around 7, the middle of the pH scale, are neutral, like water. Lemon juice has a pH of 2.2, since it's acidic. pH comes from the German word Potenz, "potency or power," and H, the chemical symbol for hydrogen. WORD FAMILY pH USAGE EXAMPLES Rasmussen is pursuing a Ph.D in Earth, Environment and Society, a program offered through PSU’s Geography Department. Washington Times(Dec 16, 2016) A: Adding lime to a vegetable garden on a yearly basis is generally needed to provide calcium and to raise soil pH. Seattle Times(Dec 08, 2016) This gas, acidic when dissolved in water, is also lowering the pH of the world’s sea water—a phenomenon known as ocean acidification. Economist(Dec 01, 2016) n (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); Syn\|Hypo\|Hyper pH scale acidity pH values below 7 alkalinity pH values above 7 neutrality pH value of 7 hyperacidity excessive acidity hydrogen ion concentration the number of moles of hydrogen ions per cubic decimeter
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