Utilizing Unexpected Results in Water Electrolysis to Engage Students in Scientific Inquiry

Autor/inn/en	Kim, Kihyang; Paik, Seoung-Hey
Titel	Utilizing Unexpected Results in Water Electrolysis to Engage Students in Scientific Inquiry
Quelle	In: Journal of Chemical Education, 98 (2021) 4, S.1302-1308 (7 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Zusatzinformation	ORCID (Kim, Kihyang) ORCID (Paik, Seoung-Hey)
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0021-9584
DOI	10.1021/acs.jchemed.0c01193
Schlagwörter	Water; Science Instruction; Chemistry; Science Experiments; Inquiry; Active Learning + Suchen Sie Ihr Suchwort? Wasser; Teaching of science; Science education; Natural sciences Lessons; Naturwissenschaftlicher Unterricht; Chemie; Aktives Lernen
Abstract	Water electrolysis, a well-known and simple experiment, confirms that a water molecule comprises hydrogen and oxygen atoms. In this experiment, hydroxide or hydrogen ions generated from each electrode were identified using an indicator based on the assumption that electrodes, electrolytes, and indicators do not participate in the water electrolysis reaction. However, KNO[subscript 3], which is considered as an electrolyte that is nonreactive during water electrolysis when considering the standard reduction potential, can affect electrolysis. Pencil graphite electrodes, which are commonly used in student experiments because of their low cost and easy availability, and indicators used to identify the products of water electrolysis can also influence this reaction. Therefore, students can observe various anomalies during the water electrolysis experiments. We have developed an experimental activity that allows students to observe anomalous phenomena in water electrolysis experiments. By performing this water electrolysis activity, students can participate in the process of scientific inquiry, create models, design their own research processes, conduct experiments, analyze and interpret data, and formulate evidence-based arguments based on the results of the proposed activity. By engaging in this activity, students can realize that water electrolysis is a complex process that is affected by a range of conditions. (As Provided).
Anmerkungen	Division of Chemical Education, Inc. and ACS Publications Division of the American Chemical Society. 1155 Sixteenth Street NW, Washington, DC 20036. Tel: 800-227-5558; Tel: 202-872-4600; e-mail: eic@jce.acs.org; Web site: http://pubs.acs.org/jchemeduc
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2024/1/01