MadSci Network: Science History

Re: What does pH stand for and who invented it? Can you help me?

Date: Mon Sep 10 02:46:19 2001
Posted By: Eric Maass, Director, semiconductors / communication products
Area of science: Science History
ID: 1000061651.Sh

The term "pH" was invented in 1909 by the Danish chemist Søren Sørensen.

pH was originally written by Dr Sørensen as PH, and it stands for pondus hydrogenii which means "potential hydrogen". The terminology refers to acidity being due to a predominance of hydrogen ions in an aqueous (water containing) solution.

Click on the picture or words for more about the origin of the pH concept, or visit either of the sites below:

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