EFFECT OF IONIC SIZES OF HALIDE ANIONS OF POTASSIUM SALTS ON SURFACE AND INTERFACIAL TENSIONS OF BENZENE AND WATER INTERFACES FOR MUTUAL MIXING

Man Singh () and Hideki Matsuoka ()
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Man Singh: Chemistry Research Laboratory, Deshbandhu College, University of Delhi, New Delhi 110019, India
Hideki Matsuoka: Graduate School of Engineering, Department of Polymer Chemistry, Kyoto University, Kyoto, Japan

Surface Review and Letters (SRL), 2009, vol. 16, issue 05, 743-747

Abstract: Surface tension (γ, mN/m) of potassium halide salts with water and interfacial tension (IFT) (±0.01 mN/m) of benzene interfaces with water are reported at 298.15 K temperature. The 0.1, 0.5 and 1.0 mol kg-1potassium fluoride (KF), chloride (KCl), bromide (KBr) and potassium iodide (KI) solutions were studied. TheKCl, KBr, KFandKIincreased the surface tension by 5.2, 4.0, 3.1 and 3.0%, respectively, with salt–water interaction influence by anionic sizes. The surface tension of water from air–water to benzene–water interfaces is decreased by 51% due to the benzene–water mutual interaction with dipolar and π-conjugation. TheKI, KF, KClandKBrsalts decrease the IFT by 63, 61, 61 and 56%, respectively, because of larger differences in sizes of the anions and theK+with individual salt. TheKIdeveloped stronger interactions with an induced potential of a large sizedI-anion that held the water engaged and integrated the aqueous phase with higher interfacial tension. The dipolar and π-conjugation interaction model is proposed with biphasic systems.

Keywords: Survismeter; interface; surface tension; conjugation; cohesive force (search for similar items in EconPapers)
Date: 2009
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DOI: 10.1142/S0218625X09013219

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