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

Today’s Google doodle honors the Danish chemist S.P.L. Sørensen. As the head of Copenhagen’s Carlsberg Laboratory, Sørensen is known for inventing the pH scale to measure acidity and alkaline levels of substances and solutions. Leading to a search for “S.P.L. Sørensen,” the animated doodle presents a tomato, an egg, broccoli, a lemon, soap and battery …

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