FACTOID # 87: 22% of American women aged 20 gave birth while in their teens. In Switzerland and Japan, only 2% did so.
 
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Encyclopedia > Phở

PH or ph or pH or Ph may be:

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pH (648 words)
The pH of distilled water is 7, this is neutral.
The pH scale was invented a long time ago and sometime it seems a little silly that the more acid it is the lower the pH is. Really it is quite easy.
So to recap if the pH is low, it means that there is a high concentration of Hydrogen ions and if the pH is high it means that there is very low concentration of Hydrogen ions or none at all.
PH - Wikipedia, the free encyclopedia (1400 words)
Though pH is generally expressed without units, it is not an arbitrary scale; the number arises from a definition based on the activity of hydrogen ions in the solution.
The pH scale is a reverse logarithmic representation of relative hydrogen proton (H+) concentration.
The formula for pH was derived from the application of the Nernst Equation to concentration cells, or galvanic cells where the half cells are at different concentrations.
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