Accession Number:

AD0631625

Title:

EXPERIMENTAL STUDY OF THE ELECTRICAL DOUBLE LAYER IN VERY DILUTE AQUEOUS SOLUTIONS.

Descriptive Note:

Technical rept.,

Corporate Author:

LOUISIANA STATE UNIV BATON ROUGE DEPT OF CHEMISTRY

Report Date:

1966-02-01

Pagination or Media Count:

12.0

Abstract:

Two methods are described for the measurement of the double layer differential capacity in media of low conductivity, i.e. under conditions in which the conventional bridge method fails a measurement of the change of potential caused by coulostatic charging with a small excursion of potential b determination, under coulostatic conditions, of the time constant of the circuit comprising the double layer capacity in series with a large resistance. The first method is definitely the more convenient and slightly more accurate. Application is made to 0.001 to 0.00001 M sodium fluoride, and results agree with those calculated from the Gouy-Chapman theory for Grahames capacities of the compact double layer. The coulostatic method is compared with the bridge method and some potential applications are mentioned. Author

Subject Categories:

  • Physical Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE