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en.wikipedia.org/wiki/PH

In chemistry, pH (potential of hydrogen) is a numeric scale used to specify the acidity or basicity .... For instance, if one wishes to measure the pH of a seawater sample, the electrode should be calibrated in a solution resembling seawater in its ...

www.edu.pe.ca/gulfshore/Archives/ACIDSBAS/scipage.htm

The pH scale measures how acidic or basic a substance is. It ranges from 0 to 14. If a pH is lower than 7 it indicates the solution is an acid. If it is above 7 it is a ...

socratic.org/questions/what-does-the-ph-scale-measure

Mar 31, 2017 ... pH scale measure the concentration of hydrogen ion and hydroxyl ion in the compound.

chemistry.elmhurst.edu/vchembook/184ph.html

The pH scale measures how acidic or basic a substance is. The pH scale ranges from 0 to 14. A pH of 7 is neutral. A pH less than 7 is acidic. A pH greater than 7 ...

www.quora.com/What-are-acids-and-bases-and-what-does-a-pH-scale-measure-in-chemistry

Definition According to the simplest definition (Arrhenius Definition) , acids are substances which are able to provide H+ ions, and bases are substances whi...

www.reference.com/science/ph-scale-measure-6cafe39d96769fc5

The pH scale is a logarithmic scale used to measure acidity. The pH scale measures how basic or acidic a substance is, and it ranges from 0 to 14. On the pH ...

www.businessdictionary.com/definition/pH-scale.html

Definition of pH scale: A measure of acidity or alkalinity of water soluble substances (pH stands for 'potential of Hydrogen'). A pH value is a number from 1 to 14, ...

hyperphysics.phy-astr.gsu.edu/hbase/Chemical/ph.html

The pH of a solution is a measure of the molar concentration of hydrogen ions in ... zero for a 1 Molar solution of H+ ions, so that defines the zero of the pH scale.

www3.epa.gov/acidrain/education/site_students/phscale.html

Acid Rain and the pH Scale. The pH scale measures how acidic an object is. Objects that are not very acidic are called basic. The scale has values ranging from ...