Google Doodle celebrates creator of pH scale S.P.L. Sorensen
https://www.cnet.com/news/google-doodle-celebrates-creator-of-ph-scale-s-p-l-sorensen/
One of the first things you learn in Chemistry at school is the pH scale, which measures acidity and alkalinity.
On Tuesday, Google celebrates the scale's creator, S.P.L. Sorensen.