Model Drude applied in ionic solutions

  • Vanessa Werlang
  • Nicole D. C. Lebr˜ao
  • Erica R. L. R. Watanabe
  • Mauricio A. Ribeiro
  • Jessica R. P. Oliveira
  • Ervin K. Lenzi
  • Aandressa Novastki
  • Lariana N. B. Almeida
  • Giane G. Lenzi

Abstract

In this study presents a theoretical and experimental approach to the diffusion of ions and conductometry of ionic solutions. The bases used the related theory of mass transfer, diffusion, of ionic solutions and ionic conductometry. Potassium acetate and tribasic sodium citrate salts at different temperatures $(20^{\circ}C, 25^{\circ}C, 35^{\circ}C)$ were used to study the mobility of ions. The results indicated a different electrical response that means a distinct behavior of ions when in aqueous solutions of pure salts or mixtures. The study verifies that the mixture of solutions and the temperature directly influenced the conductivity. For the temperature of $20^{\circ}C$ the result of the sequence for the conductivity as a function of time was: $10\%$ ethyl acetate - $90\%$ citrate $>$ $90\%$ ethyl acetate - $10\%$ citrate $>$ $50\%$ citrate - $50\%$ acetate $>$ citrate $>$ acetate; to a temperature of $25 ^{\circ} C$ to approximately sequence is: citrate $>$ acetate $>$ $50\%$ ethyl acetate - $50\%$ citrate $>$ $90\%$ ethyl acetate - $10\%$ citrate $>$ $10\%$ ethyl acetate - $90\%$ citrate (up to ~ 10 min) and $35^{\circ}C$ conductivity versus time was the following: $10\%$ ethyl acetate – $90\%$ citrate $>$ $50\%$ citrate – $50\%$ acetate $>$ citrate $>$ $90\%$ acetate - $10\%$ citrate $>$ acetate. Moreover, the experimental data obtained were adjusted to the model proposed by Drude.

Published
2019-02-26