Google Doodle celebrates the founder of the pH scale, SPL Sorensen, with an animated game involving sorting acidic and alkaline substances
Google Doodle today involves going back to your chemistry lessons from school. The Doodle celebrates SPL Sørensen, a Danish biochemist, who is credited with having founded the pH scale system which is a scale for measuring the acidity and alkalinity. SPL Sorensen. Image: Wikipedia Born on 9 January 1868 in Havrebjerg in Denmark, Søren Peder Lauritz Sørensen worked at the Carlsberg Laboratory in Copenhagen from 1901 to 1938. The concept of pH values was introduced in 1909 as a convenient way to express acidity. According to Science History , the context for introducing the concept of pH was moving away from colour change tests for indicating the degree of acidity and alkalinity to electrical methods of deriving it. In the electric method, "the current generated in an electrochemical cell by ions migrating to oppositely charged electrodes was measured, using a highly sensitive (and delicate) galvanometer." That was until Sorensen developed the pH scale which...