A new two-parameter equation for correlation and prediction of densities as a function of concentration and temperature in binary aqueous solutions

A detailed numerical analysis of the literature densities in aqueous solutions was performed in order to obtain their representation which will be simple and accurate for engineering and physical calculations, and will also be suitable for reliable predictions of densities as a function of concentration and temperature. This was achieved by introducing a new two-parameter equation for densities which includes the pure water density at a given temperature and the function F(w) = Aw + Bw². The adjustable parameters A and B are independent of temperature and w is the mass fraction of dissolved in water substance. A and B parameters were evaluated for 643 aqueous solutions of strong and weak inorganic electrolytes, ionic liquids, organic acids, salts of organic acids, amino acids, sugars, peptides and other industrially and biologically important substances.