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Measurement of the Diffusivity of Cesium Ion in Aqueous Rubidium Chloride Solution

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Abstract

For the first time cesium diffusivity in aqueous solutions of rubidium chloride is being reported here in the concentration range from 0.001 to 4.00 mol⋅dm−3. The measurement use a radioactive tracer technique employing a sliding cell mechanism. These diffusivity values were utilized to understand the transport mechanism of Cs ion in the RbCl–H2O system using the Onsager-Gosting-Harned equation and the extended Debye-Hückel equation. The observed deviation between the theoretical and experimental diffusivities are explained by introducing the concept of Field-Dielectric-Gradient forces and energies that exist around an ion, which takes care of the finite size of the ion, ion-water interaction and the ion-ion interaction in a continuum basis.

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Authors and Affiliations

  1. Dept. of Physics, Lady Brabourne College, P-1/2 Suhrawardy Avenue, Kolkata, 700017, India

    Haimanti Chakrabarti

  2. 518, Baishnabghata patuli, flat 1, Dakshinayan, Kolkata, 700094, India

    Baishali Kanjilal

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  1. Haimanti Chakrabarti
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  2. Baishali Kanjilal
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Correspondence to Haimanti Chakrabarti.

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Chakrabarti, H., Kanjilal, B. Measurement of the Diffusivity of Cesium Ion in Aqueous Rubidium Chloride Solution. J Solution Chem 39, 409–416 (2010). https://doi.org/10.1007/s10953-010-9508-y

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