Refractive index, viscosity, density, and speed of sound of aqueous sodium tartrate solutions at various temperatures

Refractive index, viscosity, density, and speed of sound of solutions of sodium tartrate at (25, 35, and 45) °C have been measured. The obtained refractive index, viscosity, density, and speed of sound data were correlated with suitable equations. The experimental density data for sodium tartrate were used to obtain limiting apparent molal volume at each temperature from which the corresponding infinite dilution molal volume for tartrare ion was calculated. The obtained density data were also used together with the corresponding speed of sound data to determine isentropic compressibilities of the solutions, and these data were also fitted to an empirical equation.