Abstract
Changes in absorbance of the thiocyanate ion (SCN) at λ = 220 nm, measured in concentrated aqueous perchloric acid solution, were analyzed using a titration curve expression containing the Xo excess acidity function; this provided the acidity constant Ka = 19.2 ± 1.1 M, pKa = 1.28 ± 0.03, for isothiocyanic acid (SCNH).Key words: isothiocyanic acid (acidity of), thiocyanate ion (basicity of), acidbase titration in concentrated aqueous acids, Xo excess acidity function, CoxYates method.
Publisher
Canadian Science Publishing
Subject
Organic Chemistry,General Chemistry,Catalysis
Cited by
14 articles.
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