Compilation - Sodium formate with Water (IUPAC SDS Volume 73)
SDS Volume (4796)
Volume 73. Metal and Ammonium Formate Systems, p None
Original Measurements
Sidgwick, N. V.; Gentle, J. A. H. R.; J. Chem. Soc. 121, 1837 (1922).
Variables:
Room Temp: -4.29 - -18.04 °C
Prepared by:
St. Trendafilova, Chr. Balarew
Method/Apparatus/Procedure:
The freezing points were measured in a Beckmann apparatus. Analysis was done gravimetrically by evaporating the solution to dryness.
Source and Purity of Materials:
- The sodium formate was prepared by neutralizing fotmic acid with the carbonate or hydroxide. Commercial 80% formic acid was distilled in a vacuum at 70°C with enough sulfuric acid to remove the water.
Estimated Errors:
Ambient temperature: No information is given.
Mass concentration (m/v) (1): No information is given.
Components:
- Sodium formate, $\ce{ NaCHO2 }$; [141-53-7] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
Composition of the liquid equilibrium phase.
| $T$ (°C) | 100w1 | $100 x_{1}$ | m1 (mol/kg) | Phase (s) () |
|---|---|---|---|---|
| -4.29 | 7.24 | 2.02 | 1.15 | Ice |
| -7.02 | 11.42 | 3.303 | 1.896 | Ice |
| -11.02 | 16.95 | 5.127 | 3.001 | Ice |
| -18.04 | 24.86 | 8.035 | 4.865 | Ice |
(a) The molality values were calculated by the compilers.
