pH Scale

Ø The concept of pH was first introduced by the Danish chemist Søren Peder Lauritz Sørensen at the Carlsberg Laboratory in 1909 .

Ø pH was originally acronym for French clause "pouvoir hydrogène," which can be translated into the English as "power of hydrogen," or "potential of hydrogen."

Ø pH is used to quantify acidic or alkaline nature of a chemical which is measured in terms of H+ ions concentration.