Exploration of Scientific Inquiry Mode in Teaching Research-Based Analytical Chemistry Experiment:Homogeneous Precipitation Process of Barium Sulfate
DOU Zu-Qi1, SONG Ze-Chen-Xi1, LI Jiao1,2**, YAO Qi-Zhi1,2, JIN Gu1,2, LIU Hong-Yu1,2, LI Ling-Ling1,2
1. School of Chemistry and Materials Science,University of Science and Technology of China Hefei,Hefei 230026,China; 2. National Demonstration Center for Experimental Chemistry Education,University of Science and Technology of China Hefei,Hefei 230026,China
Abstract The homogeneous precipitation of barium sulfate has found extensive applications in biomedical,pharmaceutical,and environmental remediation fields due to its high purity,uniform and controllable particle size characteristics.Taking the barium sulfate homogeneous precipitation process investigation experiment from undergraduate teaching laboratories as an example,this study guides students to explore two proposed reaction mechanisms:the acid-driven mechanism and oxidation-driven mechanism of(NH4)2S2O8 hydrolysis products during the barium sulfate homogeneous precipitation reaction.Students independently design controlled-variable experiments to analyze and verify the synergistic regulation of dual mechanisms in precipitation processes.Practical results demonstrate that through establishing an inquiry-based scientific training system following the“problem identification-hypothesis formulation-experimental design-investigation-conclusion analysis”framework,and implementing progressive teaching practices of“fundamental experiments-extended exploration”,we effectively promote the advancement of students’ higher-order cognitive thinking and better prepare them for engagement in scientific research and innovation.
DOU Zu-Qi, SONG Ze-Chen-Xi, LI Jiao, YAO Qi-Zhi, JIN Gu, LIU Hong-Yu, LI Ling-Ling. Exploration of Scientific Inquiry Mode in Teaching Research-Based Analytical Chemistry Experiment:Homogeneous Precipitation Process of Barium Sulfate[J]. Chinese Journal of Chemical Education, 2025, 46(20): 55-61.
