Data for Aqueous Malonic Acid and Malonate Salts

The Systems

The sources of the data reproduced here are listed in Tables 2 and 8 of Clegg and Seinfeld (2006a), and Table 3 of Clegg and Seinfeld (2006b). Fits of activity coefficient models to data for the pure aqueous acid, malonate salts, and solution mixtures containing malonic acid are also described in the papers.

S. L. Clegg and J. H. Seinfeld (2006a) J. Phys. Chem. A, 110, 5692-5717.
S. L. Clegg and J. H. Seinfeld (2006b) J. Phys. Chem. A, 110, 5718-5734.


The values in the tables only indicate whether the data were used by Clegg and Seinfeld (2006a,b) in the fits of their models. Weightings in each individual fit were usually based upon the uncertainties in the measurements (which are also listed). Thus, a weight of 1.0 indicates that the data point was used, 0.0 that the point was rejected as erroneous, and " - " that it was either not considered or was used for comparison only.

The Data

Follow the links below to the tables of experimental data. Notes at the end of each table define the tabulated quantities, and identify the sources of the measurements. The symbol "H2Malo" denotes malonic acid, "HMalo" is hydrogen malonate, and "Malo2−" is the malonate ion.
  1. H2Malo   (water activities)
  2. H2Malo + (NH4)2SO4   (water activities, deliquescence, eutonic composition)
  3. H2Malo + NaCl   (water activities, dissociation constants, solubilities)
  4. H2Malo + HCl, and H2SO4   (solubilities)
  5. NaHMalo   (osmotic coefficients)
  6. NaHMalo + NaCl, and HCl   (activity coefficients of NaCl, and activities of HCl)
  7. Na2Malo   (water activities)
  8. Na2Malo + NaCl   (activity coefficients of NaCl)
  9. NaHMalo + Na2Malo + NaCl   (activities of HCl)