S.P.L. Sørensen Google doodle doubles as a quiz for pH levels of food, soap & batteries

The Danish chemist is known for the pH scale he invented to measure acidity and alkalinity levels.

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source https://searchengineland.com/s-p-l-sorensen-google-doodle-doubles-as-a-quiz-on-ph-levels-of-food-soap-batteries-299244

source http://socialmediamarketingconsultantseo.blogspot.com/2018/05/spl-srensen-google-doodle-doubles-as.html