Substance Selection in Teaching Experiment of Bubble-Pressure Method for Measuring Surface Tension of Solutions
SI Cheng-Yun, LI Ming-Hao, LI You-Zheng, LI Xin-Yu, WU Xue, LIU Xin-Yue, XU Yi-Bin, BING Zong-Qi, YU Jie, GUO Jiao, BI Qi-Feng, SHEN Zao-Hong, XU Kai-Jun**
School of Science, China Pharmaceutical University, Nanjing 211198, China
Abstract Improvement of teaching experiment of measuring surface tension of solutions by bubble-pressure method in Chinese universities is briefly reviewed. The surface tension isotherm of 17 common organic substances such as ruthenium acetate, propionic acid, butyric acid, 2-methyl butyric acid, 3-methyl butyric acid, valeric acid, hexanoic acid, methanol, propyl alcohol, isopropyl alcohol, 1-butanol, 2-methyl-1-propanol, ethylene glycol, 1,2-propanediol, tween 20,tween 80, and sodium dodecyl sulfate in aqueous solution at 25 ℃ and some of these substances at 15 ℃, 20 ℃ and 35 ℃ are compared. It was pointed out that 1-butanol, isopropyl alcohol and propyl alcohol might be acceptable substance for teaching experiments.
SI Cheng-Yun, LI Ming-Hao, LI You-Zheng, LI Xin-Yu, WU Xue, LIU Xin-Yue, XU Yi-Bin, BING Zong-Qi, YU Jie, GUO Jiao, BI Qi-Feng, SHEN Zao-Hong, XU Kai-Jun. Substance Selection in Teaching Experiment of Bubble-Pressure Method for Measuring Surface Tension of Solutions[J]. Chinese Journal of Chemical Education, 2020, 41(22): 42-47.
