University Chemistry ›› 2018, Vol. 33 ›› Issue (12): 46-50.doi: 10.3866/PKU.DXHX201804012

• Chemistry Laboratory • Previous Articles     Next Articles

Application of Problem-Oriented Teaching in General Chemistry Laboratory Classroom: A Case Study of "Titration Conditions on the Content Determination of Copper in K2[Cu(C2O4)2]"

Xiaocong TIAN,Bin LIU,Changsheng LU,Fengbin WANG*()   

  • Received:2018-04-10 Published:2018-12-14
  • Contact: Fengbin WANG E-mail:fbwang@nju.edu.cn
  • Supported by:
    国家基础科学人才培养基金(J1210030);南京大学"十三五"实验教学改革研究课题(SY201703)

Abstract:

Due to the facts that textbook-obedience and termwise experimenting dominate in the general chemistry laboratory classrooms, we have designed and carried out the problem-oriented teaching in order to improve the motivation of learning among the students, where the student-centered exploratory studying and practicing mode is highly desired. Problem-oriented teaching does not lead to exclusive resolutions to specific problems or experiments. Instead, it is supposed to induce multiple choices among student groups to complete experiments or resolve problems, where in-group/between-group discussions and practices would greatly activate the experimenting processes. Therefore, the sense of personal acquisition and self-progression during learning in laboratory classrooms can be easily achieved, while the good laboratory teaching will be realized as well. In this paper, we set up a problem-oriented teaching in optimizing the titration condition during measuring the copper content of K2[Cu(C2O4)2] using PAN (1-(2-pyridylazo)-2-naphthol) as the indicator. Grouping practices and experiments finally produced complementary results, as well as the satisfactory teaching and learning impacts.

Key words: Laboratory teaching, Problem-oriented teaching, Measurement of copper content, PAN indicator

MSC2000: 

  • G64