Ultrasonic absorption in dimethyl sulphoxide solutions of alkali halides

Creator: 

Dickson, David Ross

Date: 

1968

Abstract: 

The ultrasonic absorption of solutions of alkali halides in dimethyl sulphoxide is studied by the pulse technique over the frequency range from 3.5 to 60 MHz. A relaxation is observed between 2 and 10 MHz for each salt studied. This relaxation is assigned to the second equilibrium in the two step formation of a contact ion pair from free ions in the solution.

[M+]sol.+X-k12<->K21[M+ DMSO X-]sol.k23<->K32[M+X-]sol.

The rate constants for this second step have an upper limit of 10^7 sec^-1. ΔVs for this step is found to be about 2 cm^3mole^-1.

There is evidence that a relaxation at a frequency higher than the range of the apparatus is occuring. This may be due to the first step which is diffusion controlled and much faster.

Subject: 

Halides
Ultrasonic Waves
Electrolytes

Language: 

English

Publisher: 

Carleton University

Thesis Degree Name: 

Master of Science: 
M.Sc.

Thesis Degree Level: 

Master's

Thesis Degree Discipline: 

Chemistry

Parent Collection: 

Theses and Dissertations

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