From p"K"[subscript a] to the pH of Weak Base Solutions

Autor/in	McEvoy, James P.
Titel	From p"K"[subscript a] to the pH of Weak Base Solutions
Quelle	In: Biochemistry and Molecular Biology Education, 48 (2020) 3, S.259-261 (3 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Zusatzinformation	ORCID (McEvoy, James P.)
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1470-8175
DOI	10.1002/bmb.21336
Schlagwörter	Biochemistry; Undergraduate Students; Science Instruction; Risk; Teaching Methods; Measurement; Error Patterns + Suchen Sie Ihr Suchwort? Biochemie; Teaching of science; Science education; Natural sciences Lessons; Naturwissenschaftlicher Unterricht; Risiko; Teaching method; Lehrmethode; Unterrichtsmethode; Messverfahren; Fehlertyp
Abstract	Undergraduate biochemistry students frequently find the quantitative treatment of weak acids and bases troublesome. Given the p"K"[subscript a] of a weak acid "HA," for instance, many students struggle to calculate the pH of a solution of the conjugate base A[superscript -] at concentration "C," pH(A[superscript -], "C"). The traditional method involves calculating the base dissociation constant "K"[subscript b] and the artificial quantity pOH before reaching pH, but these steps increase the risk of mistakes and provide little insight into acid-base equilibria. The alternative method presented here allows students to calculate the pH of a weak base solution from the p"K"[subscript a] of its conjugate acid without calculating "K"[subscript b] and pOH, using a memorable relationship: pH(HA, "C") + pH(A[superscript -], "C") = p"K"[subscript a] + 7. (As Provided).
Anmerkungen	Wiley-Blackwell. 350 Main Street, Malden, MA 02148. Tel: 800-835-6770; Tel: 781-388-8598; Fax: 781-388-8232; e-mail: cs-journals@wiley.com; Web site: http://www.wiley.com/WileyCDA
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2024/1/01