Components:
(1) Sodium formate,
NaCHO2; [141-53-7]
NIST WebBook
(2) Water,
H2O; [7732-18-5]
NIST WebBook
Original Measurements
Groschuff, E.; Ber. Dtsch. Chem. Ges. 36, 1783-95 (1903).
Variables:
Ambient temperature: -20 - 123 °C
Prepared by:
St. Trendafilova, Chr. Balarew
Method/Apparatus/Procedure:
No information is given, but it appears that the analysis for Na was done gravimetrically by weighing sodium sulfate.
Source and Purity of Materials:
- No information is given.
Estimated Errors:
Ambient temperature: No information is given.
Mass concentration (m/v) (1): No information is given.
Experimental Values:
Note: Note: When equivalent amounts of sodium formate and anhydrous formic acid are mixed in the cold, NaCHO2·CH2O2 is formed. A heating curve indicates that this salt decomposes at 65°C.Composition of equilibrium liquid phase.
| T (°C) | 100w1 | m1 (mol/kg)a | Phase (s)b |
|---|---|---|---|
| -20.0 | 22.8 | 4.34 | A |
| 0.0 | 30.47 | 6.44 | A |
| 15.0 | 41.88 | 10.59 | A |
| 18.0 | 44.92 | 11.99 | A |
| 18.0 | 44.73 | 11.9 | A |
| 21.0 | 46.86 | 12.96 | A |
| 23.0 | 48.22 | 13.69 | A |
| 25.5 | 50.53 | 15.02 | A |
| 18.0 | 49.22 | 14.25 | B |
| 25.5 | 49.95 | 14.67 | B |
| 29.0 | 50.44 | 14.96 | B |
| 54.0 | 53.8 | 17.12 | B |
| 74.5 | 56.82 | 19.35 | B |
| 100.5 | 61.54 | 23.52 | B |
| 123.0 | 66.2 | 28.79 | B |
(a) These values were calculated by the compilers. (b) The solid phases are: A = NaCHO2·2H2O; B = NaCHO2.
