Journal of Solution Chemistry

, Volume 15, Issue 10, pp 811–826 | Cite as

Instabilities in free diffusion boundaries of NaCl-sucrose-H2O solution at 25°C

  • V. Vitagliano
  • G. Borriello
  • C. Della Volpe
  • O. Ortona
Article

Abstract

The four diffusion coefficients for the system sucrose (0.097M)-NaCl-(0.291M)-water at 25°C have been measured by the Gouy interferometric technique. The cross terms D12 and D21 are small However, if sucrose or NaCl are chosen as component 3 instead of water, one of the cross terms becomes very large. Several runs were used to test the McDougall analysis of gravitational instability in diffusion boundaries for three component systems. Growth of convective motions at the center and at the edges of the boundary have been observed that confirm the McDougall model.

Key Words

Diffusion convection ternary system sucrose sodium chloride aqueous solutions 

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Copyright information

© Plenum Publishing Corporation 1986

Authors and Affiliations

  • V. Vitagliano
    • 1
  • G. Borriello
    • 1
  • C. Della Volpe
    • 1
  • O. Ortona
    • 1
  1. 1.Dipartimento di ChimicaUniversity of NaplesNaplesItaly

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