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# E.C. pH - is derived from the dissociation constant of...

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Why does pH range from 0 to 14? First of all, pH is a scale used for measure how acidic or basic a substance is. 7 is neutral, and less than 7 is acidic and greater than 7 is basic. Each increasing number represents 10 times as much acidity or basic-y. It can be greater than 14 or less than 0, but we can’t be measure with our electrodes. Electrodes are conductors through which electricity enters and leaves. Reference 1 http://www.sensorex.com/support/education/pH_education.html Reference 2 www.translatorpub.com/user_docs/2267G_7172008_945.doc

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Article 1 What Is pH? pH is a measure of acidity or alkalinity. The amount of hydrogen ions (H+) causes a liquid to be acidic (high  concentration of hydrogen ions) or alkaline (low concentration of hydrogen ions).  The pH range is measured from 0  to 14. Values below 0 or above 14 are possible but rare and cannot be measured with our electrodes.  The pH scale
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Unformatted text preview: is derived from the dissociation constant of water in the following equation: H2O -> H+ + OH- = 1 x 10-14 (mol/L)2 = Kw (Kw is the dissociation constant of water). Article 2 Electrode A conductor through which a current of electricity enters or leaves. One or more may be contained in a probe. The term may be used interchangeably with the term probe when talking about a piece of laboratory equipment....
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