Revisiting the Determination of Percent Aspirin Lab: Using a Limiting Reactant Approach for Students to Also Determine the Amount of Iron(III) Chloride

Autor/inn/en	Bodek, Matthew; Burch, Mary; Cannon, Joshua; Finneran, David; Geveke, Kathleen; Sinkinson, Heather; Smith, William; Tierney, John
Titel	Revisiting the Determination of Percent Aspirin Lab: Using a Limiting Reactant Approach for Students to Also Determine the Amount of Iron(III) Chloride
Quelle	In: Journal of Chemical Education, 97 (2020) 2, S.574-577 (4 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Zusatzinformation	ORCID (Finneran, David) ORCID (Tierney, John)
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0021-9584
Schlagwörter	Chemistry; Spectroscopy; Laboratory Experiments; Hands on Science; Science Experiments; Pharmacology; Undergraduate Students + Suchen Sie Ihr Suchwort? Chemie; Spektroskopie; Laboratory work; Laborarbeit; Arzneikunde
Abstract	The spectrophotometric determination of the percent composition of an aspirin tablet is a common first-year, general chemistry undergraduate laboratory procedure. The experiment requires that a known amount of pure acetylsalicylic acid be quantitatively converted into the soluble disodium salicylic acid that is further reacted with excess iron(III) chloride solution to form a deep blue tetraaqua-octahedral complex. This complex, through serial dilutions, is used to construct a Beer's law plot that may be used to determine the concentration of aspirin. In a novel twist, this paper describes how the same Beer's law plot can be used to determine the concentration of iron in the iron(III) complex, which is then used to determine the concentration of the original iron(III) chloride solution used to make the aspirin-iron(III) complex. The method has been adapted by high school students in determining iron concentrations in stream waters. (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2024/1/01