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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 11, Number 2
JKCSEZ 11(2)
April 20, 1967 

The Stability Constants of Lead Acetato Complexes as Function of Temperature and Ionic Strength

Pb-Acetato Complexes의 이온강도 및 온도 변화에 따른 안정도상수에 관한 고찰

황정의, 전수주
NaAc와 HAc로 된 완충용액에서 납의 mono di, tri, Acetato Complexes의 안정도상수를 이온강도 2.00, 1.00, 0.75, 그리고 온도 150℃, 20℃, 25℃, 35℃에서 Leden의 전위측정법으로 측정하고, 15℃에서는 Hume과 DeFord의 Polarographie Method로서도, 아울러 측정비교하였다. 안정도상수(Kijk)와 이온강도( j), 그리고 온도(Tk) 사이에 다음과 같은 관계가 있음을 알았다. logKijk = ( Ai/ j3 + Bi) / Tk + Ci/ j3 + Di

The stability constants of lead acetato conplexes were evaluated in various ionic strengths (2.00, 1.00, and 0.75), and at various temperature (15, 20, 25, 30, and 35℃), respectively, by the polarographic and potentiometric method of which Hume and Leden had described. The existence of three complex ions, PbAc+, PbAc2, and PbAc3- have been shown in the range of concentration of 0~0.8 mole acetate ion. Referring to values obtained, we have derived the following empirical formula with the stability constant (Kijk), ternperature (Tk) and ionic strength (μj). log Kijk = (Ai/μj3 + Bi)/Tk + Ci/ μj3 + Di. The deduced and observed stability constants are matched in 5% for the K, and K3, and 20% for the K2.

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