Abstract The purpose of this study is to develop a three-tier diagnostic test to assess students’ conceptual understanding of chemical equilibrium. The participants come from a secondary key middle school in Zhejiang Province, and all of them select chemistry subject in the college entrance examination. The three-tier diagnostic test are consisted of three dimensions: judgment of chemical equilibrium state; equilibrium constant and reaction conversion rate; influencing factors of equilibrium movement. The results indicate that students’ understandings of chemical equilibrium are good in general. But there are lots of alternative conceptions when students use reaction rate to judge the equilibrium state. Students’ calculation ability and self-confidence in conversion rate are slightly inadequate. There are also cognitive deficiencies in the influencing factors of equilibrium movement, such as catalyst and pressure. Especially the latter, students have not really understood the mechanism of pressure affecting equilibrium movement.
FU Qian-Wen, ZHU Li-Ying. Investigation on Understanding of Chemical Equilibrium Based on Three-Tier Diagnostic Test[J]. Chinese Journal of Chemical Education, 2020, 41(13): 73-79.
