CALCIUM CYCLE IN CHEMISTRY TEACHING AT THE LOWER SECONDARY SCHOOL

Author:

Kolar Karel, ,Bilek Martin,Chroustova Katerina,Rychtera Jiri,Machkova Veronika, , , ,

Abstract

The research is focused on the use of experimental calcium cycle in chemistry teaching at the lower secondary school. The cycle is based on four reactions: 1. thermal decomposition of calcium carbonate, 2. reaction of calcium oxide with water, 3. calcium hydroxide with hydrochloric acid, 4. reaction of calcium chloride with sodium carbonate. The calcium cycle was tested at lower secondary schools (and equal classes from comprehensive schools). Despite the difficulty of taking some steps, the cycle was accepted by both teachers and learners. Keywords: chemistry teaching, experimental cycle, calcium cycle, lower secondary education.

Publisher

Scientia Socialis Ltd.

Reference5 articles.

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2. Duesing, B. (1985). The calcium cycle. In Curriculum units by fellows of the Yale-New Haven teachers institute: Skeletal Materials-Biomineralization, 7. Retrieved from http://teachersinstitute.yale.edu/curriculum/units/1985/7/85.07.08.x.html

3. Royal Society of Chemistry (2008). Thermal decomposition of calcium carbonate. RSC - Advancing the Chemical Sciences. Retrieved from https://rsc.li/2DAZnH4

4. From Eggshells to Quicklime: Using carbonate cycle as an integrating concept to introduce students to materials analysis by TGA and FTIR;Vera;Journal of Chemical Education,2018

5. Kolar, K., Bilek, M., Machkova, V., Rychtera, J., & Chroustova, K. (2018). Experimental cycles as alternative approach to teaching the topic chemical reactions. In Miecznikowski, K. (Ed.), 14th European Conference on Research in Chemical Education "Educational innovations and teacher needs" - Book of Abstracts (pp. 7-8). Warszaw: Warszaw University.

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