Effects of Ultrasound on pH and Conductivity of K2HPO4 Solution

In order to elucidate the role of various ultrasonic effects on pH and conductivity of K₂HPO₄ solution, the dependencies of both properties on the solution temperature which rises due to ultrasonic thermo- effect are investigated. As the K₂HPO₄ solution is heated by the conventional method, the pH is linear with the reciprocal of thermodynamic temperature and the conductivity is linear with the temperature when the solution is irradiated by the ultrasound. Therefore, it is reasonably thought that ultrasonic thermo-effect, rather than cavitation and mechanical effect, is the primary factor affecting the ionization equilibrium and the ion migration in K₂HPO₄ solution. Based on the founded mathematical model for the temperature of bulk solution under ultrasound irradiation, the quantitative terms for the pH and the conductivity of K₂HPO₄ solution were respectively derived from operation parameters. In addition, the effects of ultrasonic waves on the pH and the conductivity of K₂HPO₄ solutions are reversible.