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Chemistry Calendar: on this day in 1868, Danish chemist Søren Sørensen was born. Sørensen headed the prestigious Carlsberg Laboratory for over 30 years, where he developed the pH scale for measuring acidity. #chemistrycalendar #chemsky #chematcam
Graphic celebrating Soren Sorenson, with images of Sorenson and the pJ scale. Text reads: "On this Day: January 9th 1868, birth of Danish Chemist Soren Sorensen. Sorensen developed the pH scale at the Carlsberg Laboratory in Denmark. This was the first time that the negative logarithm of proton (H+) concentration was used as a measure of acidity.
January 9, 2026 at 11:46 AM