| 单词 | pH scale |
| 释义 | pH scale (once / 1477414 pages) n WORD FAMILY pH scale USAGE EXAMPLESAlkaline water is simply water that ranks high on the pH scale measuring acidity and alkalinity. Los Angeles Times(Jul 09, 2016) To work, they need to be at the opposite end of the pH scale from mineral deposits, which are alkaline. Washington Post(Mar 04, 2016) Based on measurements to date the sea has become 30 percent more acidic, a drop on the logarithmic pH scale from 8.2 to 8.1. Scientific American(Jul 21, 2015) 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 acidity pH values below 7 alkalinitypH values above 7 neutralitypH value of 7 hyperacidityexcessive acidity hydrogen ion concentration the number of moles of hydrogen ions per cubic decimeter |
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