In order to determine physically formed relations between bubble characteristics and physicochemical properties of the liquid employed, bubble size distributions and average bubble diameters were calculated using a simplified version of the theoretical model developed by Prince and Blanch (A.I.Ch.E. Journal, 36 (10) (1990) 1485 -1499). The results of calculations were compared with experimental data, obtained using two different columns: a laboratory column and a pilot plant column. Good agreement was found between calculated and experimental values.