Electrical noise in aqueous 1-1 electrolytes

✍ Scribed by D. Vasilescu; M. Teboul; H. Kranck; F. Gutmann

• Publisher: Elsevier Science
• Year: 1974
• Tongue: English
• Weight: 573 KB
• Volume: 19
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(74)85064-4

✦ Synopsis

An equivalent noise conductivity

A, for aqueous uni-univalent electrolytk is defined on the basis of the Langevin equation.

Apparatus for the recording of noise spectra and their evaluation by means of correlation methods are described.

It is shown that A, of NaCl and of KC1 solutions parallels that obtained by conventional bridge methods though no external electric field is applied in the case of noise measurements.

4" for both these electrolytes is shown to obey the Debye-Hueckel-Onsager limiting law in its concentration dependence and to exhibit the usual Arrhenius form of temperature dependence. The activation energy obtained is close to that obtained from conventional bridge methods applying an external field, and closely approximates that of the viscosity of the solvent, viz. water. The noise generated by the electrolyte is shown to be white noise, being independent of frequency without any llffrequency component being present. There is no contact noise