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PH
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===About the pH Scale===
====Foundation====
: The '''pH''' of a [[solution]] is determined by the strength and [[concentration]] of [[Hydrogen Ion(Chemistry)|Hydrogen ions]] in an [[acid]] or [[Hydroxide Ion(Chemistry)|Hydroxide ions]] in an [[alkali]].
====Higher====
: In [[acid]]s for a '''pH''' decrease of 1 there must be 10 times greater [[concentration]] of [[Hydrogen Ion(Chemistry)|Hydrogen ions]] in [[solution]].