Jan Wiktor Tomasz Zawidzki (December 20, 1866 in Wlรณki, Masovian Voivodeship โ September 14, 1928 in Warsaw) was a Polish physical chemist and historian of chemistry.
He researched mainly chemical kinetics, thermochemistry and autocatalysis.
Zawidzki was a professor of the Akademia Rolnicza in Dublany (1907โ1916), Jagiellonian University (1916โ1917), University of Warsaw (1917โ1928), rector of the University of Warsaw (1918โ1919), member of the Academy of Learning (since 1918), co-founder of the Polskie Towarzystwo Chemiczne and magazine Roczniki Chemii.