Vitamin C as a Model for a Novel and Approachable Experimental Framework for Investigating Spectrophotometry

Autor/inn/en	Angarita-Rivera, Paula A.; Gabbard, Devan B.; Main, Kegan A.; Timmermann, Katherine M.; Kinkade, Karla B.; Wilson, Kristy J.; Doçi, Colleen L.
Titel	Vitamin C as a Model for a Novel and Approachable Experimental Framework for Investigating Spectrophotometry
Quelle	In: Journal of Chemical Education, 96 (2019) 11, S.2578-2583 (6 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Zusatzinformation	ORCID (Doçi, Colleen L.)
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0021-9584
Schlagwörter	Nutrition; Laboratory Experiments; Science Experiments; Laboratory Procedures; Spectroscopy; Hands on Science; Scientific Concepts; Chemistry; Undergraduate Students; High School Students; Nonmajors + Suchen Sie Ihr Suchwort? Ernährung; Laboratory work; Laborarbeit; Laboruntersuchung; Spektroskopie; Chemie; High school; High schools; Student; Students; Oberschule; Schüler; Schülerin; Studentin
Abstract	This laboratory experiment, designed for undergraduate nonmajors or advanced high school students, attempts to demystify the technique of spectrophotometry by utilizing a hands-on, real-world approach. Modification of the reaction for the formation of Fe[(bpy)[subscript 3]][subscript 2+] allows students to interact with vitamin C, a compound with which they are familiar from daily life, and observe its concentration in an approachable experimental framework. These connections are emphasized in a protocol designed to help students correlate visual and quantitative data by generating their own standard curve against which they compare unknown solutions. This experiment was found to decisively increase students' understanding of concepts related to standard curves and spectrophotometry, and it also demonstrated gains in student understanding of solubility and its impact on colorimetry. Opportunities within this experimental framework exist for additional conceptual development related to the chemical, technological, and social aspects of the assay. Combined with its pedagogical effectiveness, this represents an excellent resource for diverse chemistry classrooms. (ERIC).
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	2020/1/01