Abstract
The electric conductivity of aqueous solutions of formic acid, acetic acid, propionic acid, hydrochloric acid, sodium chloride, sodium formate, sodium acetate, and sodium propionate was measured under the irradiation of ultrasonic wave. The conductivity increased and reached a limiting value within ten minutes. This change was found to be reversible. It was confirmed that the increase of conductivity was larger than that due to the rise in temperature caused by ultrasonic irradiation. In the case of hydrochloric acid, a pronounced increase of conductivity was observed. It seems that the protonic transition is affected more effectively by ultrasonic wave than the Stokes type migration.
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