pH
Similar term(s): acidity, alkalinity.
Definition:
pH is a measure of the concentration ofprotons (H+) in a solution and, therefore, itsacidity or alkalinity. The concept wasintroduced by S.P.L. Sørensen in 1909. The p stands for the German "Potenz",meaning power or concentration, and the Hfor the hydrogen ion (H+). Inlayman's terms , the "pH" value is an approximate number between 0 and 14 thatindicates whether a solution is acidic (pH < 7), basic (pH > 7) orneither (pH = 7) [neutral].
Source: GreenFacts
More:
Acids taste sour and react strongly with metals. Strong acidscan burn your skin. Examples of acids include vinegar, citrus fruits and stomachacid (HCl).
Bases taste bitter and feel slippery. Strong bases can burnyour skin. Examples of bases include lye (sodium hydroxide used to make soap)and ammonia.
When acids and bases are added to each other, they react to neutralize eachother, forming salt and water.
Source: GreenFacts, based on: Technology Studies in EducationAcidsBases and pH Scale
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Translation(s):
Español: pH
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