The osmotic coefficients of aqueous solutions of sodium tri- and pyrophosphates and potassium tri-, pyro- and trimetaphosphates have been determined at 25°C by an isopiestic method. Activity coefficients were derived by graphical integration of the Gibbs-Duhem equation after extrapolation of the osmotic data to infinite dilution by a Debye-Hückel-type of equation.
G. Miller and A. S. Porter, Trans. Faraday Soc., 1967, 63, 335 DOI: 10.1039/TF9676300335
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