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The liquid junction potential in potentiometric titrations. IX. The calculation of potentials across liquid junctions of the type, AY vertical bar AY+BY(z(B))+HY+A(y)L, for Emf cells where strong or weak complexes are formed, respectively, at [Y(-)] = C mol center dot L(-1), constant and -log(10)[H(+)]<= 7
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Inorganic Chemistry.
2006 (English)In: Journal of Solution Chemistry, ISSN 0095-9782, E-ISSN 1572-8927, Vol. 35, no 8, 1109-1136 p.Article in journal (Refereed) Published
Abstract [en]

In the present part, potential functions are derived for the calculation of the total potential anomalies, Delta E(B) and Delta E(H), for Emf cells where strong or weak complexes are formed, respectively. A weak or strong electrolyte is considered to be used as complexing agent (A(y)L), respectively, at the experimental condition, [Y(-)] = C mol(.)L(-1), constant. The cells have indicator electrodes reversible to B(z(B)+) (cell B) and H(+) ions (cell H), respectively.

The system, HY-BY(z(B))-A(y)L-AY and the protolysis of the acids HL and H(2)L in the ionic medium (A(+), Y(-)) are studied. Here, y = vertical bar z(L)vertical bar. Moreover, some useful Emf titrations are suggested for the experimental determination of the slope functions SL(H, L(-)), SL (H, L(2-)) and SL(H, HL(-)). The usefulness of the derived potential functions is established using the H(+)-acetate(-) (CH(3)COO(-)) system as an example.

Place, publisher, year, edition, pages
2006. Vol. 35, no 8, 1109-1136 p.
Keyword [en]
liquid junction potential, ideal diffusion potential, ionic activity factors, protolysis, total cell Emf, specific interaction theory
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-37692DOI: 10.1007/s10953-006-9052-yISI: 000241456000005Scopus ID: 2-s2.0-33749611428OAI: oai:DiVA.org:kth-37692DiVA: diva2:434911
Note
QC 20110816Available from: 2011-08-16 Created: 2011-08-16 Last updated: 2017-12-08Bibliographically approved

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