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• pH was originally an acronym for French clause Pouvoir hydrogene, which can be
translated into the English as power of hydrogen or potential of hydrogen. Hence the
name pH.
Introduction
• The pH meter was invented in 1934 by the American chemist Arnold
O. Beckman (1900-2004) to measure the sourness of lemons.
• A simple and speedy device to measure acidity or alkalinity.