ALTERNATIVE CONCEPTIONS OF COMMON SALT HYDROLYSIS AMONG UPPER-SECONDARY-SCHOOL STUDENTS

Kinga Orwat; Paweł Bernard; Anna Migdał-Mikuli

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ALTERNATIVE CONCEPTIONS OF COMMON SALT HYDROLYSIS AMONG UPPER-SECONDARY-SCHOOL STUDENTS

Title	ALTERNATIVE CONCEPTIONS OF COMMON SALT HYDROLYSIS AMONG UPPER-SECONDARY-SCHOOL STUDENTS
Publication Type	Journal Article
Year of Publication	2017
Authors	Orwat, K, Bernard, P, Migdał-Mikuli, A
Journal	Journal of Baltic Science Education
Volume	16
Issue	1
Start Page	64-76
Pagination	Continuous
Date Published	February/2017
Type of Article	Original article
ISSN	1648-3898
Other Numbers	ICID: 1232135
Keywords	acids and bases, alternative and misconceptions, chemical education research, salt hydrolysis
Abstract	Reactions in aqueous solutions are an important part of chemistry education. As experience shows, they are particularly difficult for students to understand. Hydrolysis is one such reaction. It occurs in organic and inorganic compounds with either covalent and ionic structures, but salt hydrolysis is a special example. Salt hydrolysis is complex, and to understand it, students must consider the reaction equilibrium, dissociation process, and acid-base properties of reactants and products. Additionally, in the upper-secondary-school curriculum, hydrolysis is described only qualitatively, which can lead students to misinterpret hydrolysis and solution equilibrium. In this study, 235 upper-secondary-school students answered questions about the acidity of common salt solutions and tried to justify their responses by writing appropriate chemical equations. An analysis of the answers revealed the students’ alternative conceptions and misconceptions. The character of the misconceptions showed that they are school-based and largely caused by excessive simplification of the process as well as the usage of inappropriate analogies.
URL	http://oaji.net/articles/2017/987-1493049832.pdf
DOI	10.33225/jbse/17.16.64
Refereed Designation	Refereed
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