Precise density and sound velocity measurements have been carried out on tripotassium citrate in aqueous solutions
of polypropylene oxide (PPO) 400 over a range of temperatures at atmospheric pressure. The data obtained are
used to calculate the apparent molar volume and isentropic compressibility as a function of temperature and
concentration. Apparent molar volume and isentropic compressibility values have been fitted to a Redlich−Mayer-type equation from which the apparent molar volume and apparent molar isentropic compressibility
of the solutions at infinite dilution have also been calculated at each temperature. The results show a positive
transfer volume of tripotassium citrate from pure water to an aqueous PPO solution. The apparent molar
isentropic compressibility of tripotassium citrate in aqueous PPO solutions is negative which implies that
the water molecules around the tripotassium citrate are less compressible than the water molecules in the bulk
solutions.
Precise density and sound velocity measurements have been carried out on trisodium citrate in aqueous solutions of 0.000, 0.002, and 0.004m polyvinylpyrrolidone (PVP) at T ) (283.15 to 308.15) K at atmospheric pressure. From these experimental data, the apparent molar volume and isentropic compressibility values have been evaluated and fitted to a Redlich-Mayer-type equation from which the apparent molar volume and apparent molar isentropic compressibility of the solutions at infinite dilution have also been calculated at each temperature. The results show a positive transfer volume of trisodium citrate from an aqueous PVP solution to a more concentrated PVP solution. This indicates that the size of trisodium citrate is larger in a solution with higher PVP concentration. The apparent molar isentropic compressibility of trisodium citrate in aqueous PVP solutions is negative, which implies that the water molecules around the trisodium citrate are less compressible than the water molecules in the bulk solutions.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.