How well do you remember the pH scale from chemistry class? Today’s Google Doodle presents a small interactive to jog your memory, and more importantly, celebrate Søren Peder Lauritz Sørensen ...

She previously worked at Business Insider, The Boston Globe, and Boston.com. The pH scale that is widely accepted and used by scientists didn't actually exist until 1909. Before then scientists ...

In some communities, it takes a lot of soap to properly wash your hands. This occurs in places with "hard" water, where high levels of calcium, magnesium and other alkaline minerals are found in ...

Sørensen is known for creating the pH scale, which is used to measure how acidic or alkaline a chemical is. The pH scale runs from 0 to 14. Substances that give a pH reading of 7 are salts ...