Resumo

FERNANDEZ E., F.; MERAZ M., J.S.  e  MAGANA, L.F.. The electric resistance in electrolytic solutions. Rev. mex. fis. [online]. 2003, vol.49, n.5, pp.397-400. ISSN 0035-001X.

We present a new method to measure the electric resistance of electrolytic solutions contained in conductivity cells. The innovations are the use of a new type of conductivity cell, with variable longitude and to take into account the phenomenon of electric resonance in order to cancel the effects of the double layer capacity at electrode-solution interfaces. Analysis of error propagation on geometric parameters of the cell was performed and absolute measurements were done, without chemical patterns of calibration. The results obtained with this new method and new cell type suggest the possibility of covering a wider range of values for the conductivity of electrolytic solutions.

Palavras-chave : Physical chemistry; electrochemistry; electrolytic solutions; conductivity cell.

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