ULTRASONIC VELOCITIES IN SOME BIVALENT METALLIC SULPHATES

Abstract

Ultrasonic velodties and their variation with concentration up to molar have been measured for aqueous solutions of sulphates of magnesium ,cobalt, nickel and cadmium at three different temperatures, viz., 25°C, 40°c and 600C. From the values of the velocities, the apparent molar compressibilities have been calculated. The slopes of the apparent molar compressibilities vs. square-root of concentration curves are less steep than that predicted by the Debye-Huckel theory. A possible explanation of this behaviour is discussed qualitatively.