Collect. Czech. Chem. Commun. 1994, 59, 1571-1583

Density of Aqueous Solutions of Na2CO3-NAHCO3

Zdeněk Palatý

Department of Chemical Engineering, University of Pardubice, 532 10 Pardubice, Czech Republic


The paper deals with a correlation of the ternary systems H2O - Na2CO3 - NaHCO3. The corresponding data have been correlated with an equation presuming the additivity of partial molar volumes, the components being water and the so-called basic solutions of Na2CO3 and NaHCO3. From the comparison of experimental and calculated density values of the solutions of Na2CO3 - NaHCO3, Na2CO3, and NaHCO3 at 20 °C it follows that the given procedure provides very precise results.