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Scheele (1774) "Om brunsten, eller magnesia, och dess egenskaper" (On manganese or magnesia, and its properties), Kongliga Vetenskaps Academiens Handlingar (Proceedings of the Royal Scientific Academy [of Sweden]), 35: 89-116. On pages 93-94 (paragraph 6), "Med den vanliga Salt-syran." ([Reactions of manganese dioxide] with the standard salt-acid [i.e., hydrochloric acid]), Scheele describes a gas (chlorine) that was produced when he reacted manganese dioxide with hydrochloric acid. Further experiments with chlorine appear in paragraphs 23-26, pages 105-110.

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Designing Experimental Exercises Used for Teaching Chemistry in High School

1Faculty of Chemistry, Vinh University, Vinh City, Vietnam

2Faculty of Chemistry, Dong Thap University, Dong Thap Province , Vietnam

3Faculty of Environmental Science, Saigon University, Ho Chi Minh City, Vietnam

4Nguyen Duc Mau High School, Nghe An Province, Vietnam

World Journal of Chemical Education. 2017, Vol. 5 No. 5, 168-174
DOI: 10.12691/wjce-5-5-5
Copyright © 2017 Science and Education Publishing

Cite this paper:
C.C. Giac, L.H. Hoang, N.T.P. Lien, P.H. Thanh. Designing Experimental Exercises Used for Teaching Chemistry in High School. World Journal of Chemical Education. 2017; 5(5):168-174. doi: 10.12691/wjce-5-5-5.

Correspondence to: C.C.  Giac, Faculty of Chemistry, Vinh University, Vinh City, Vietnam. Email:


This study has represented a model of experimental exercises in teaching chemistry. The model, which is the type of exercise associated with chemistry laboratories that when students answer them, they have to get the basic skills of practice chemistry. By analyzing the model of experimental exercises, we have proposed two underpinnings to design these exercises. On that basic, we proposed the way to design new experimental exercises. These methods are analyzed in detail and there are the attached application so that teacher can apply to design the same cases. Based on the proposed methods, we have designed sample exercises used in high school chemistry teaching. The exercises were solved clearly and evaluation of chemistry practical skills for students. This type of exercises is always attractive to create certain excitements for teachers and students in the teaching and learning chemistry in high school.