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    • Study of apparent molal volume and viscosity of mutual citric acid and disodium hydrogen orthophosphate aqueous systems

      Man Singh

      Volume 118 Issue 3 May 2006 pp 269-274

    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/jcsc/118/03/0269-0274

    • Keywords

       

      Citric acid-disodium hydrogen orthophosphate aqueous system; density/viscosity of aqueous systems; limiting constants at infinite dilution

    • Abstract

       

      Fundamental properties, density (ρ) and viscosity (η), of citric acid (CA) and disodium hydrogen orthophosphate (DSP) at various strengths were obtained at different temperatures. The ρ and η values were used to determine apparent molal volumes and viscosity of systems. The ρ, VΦ and η values were regressed against molalitym for ρ0, η0 and VΦ0, the limiting constants at infinite dilution (m → 0) for ionic and molecular interactions. The ρ0 and VΦ0 of aq. acids are higher than those of aq. DSP and the viscosity of DSP is higher than that of aq. CA. Examination of ρ0 and VΦ0 functions indicates that mutual compositions of CA and DSP counterbalance concentration and temperature effects on pH in bioprocesses.

    • Author Affiliations

       

      Man Singh1

      1. Chemistry Research Lab, Deshbandhu College, University of Delhi, New Delhi - 110 019

    • Dates

       
      Published
      May 2006
      Manuscript received
      24 March 2004
      Manuscript revised
      14 December 2005

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