Components:
(1) Potassium formate,
KCHO2; [590-29-4]
NIST WebBook
(2) Formic acid,
CH2O2; [64-18-6]
NIST WebBook
Original Measurements
Groschuff, E.; Ber. Dtsch. Chem. Ges. 36, 1783-95 (1903).
Variables:
Ambient temperature: 0 - 90 °C
Prepared by:
Method/Apparatus/Procedure:
The freezing point method was used to study the system. No other information is given.
Source and Purity of Materials:
- KCHO2·CH2O2 was prepared by dissolving dry potassium formate in anhydrous formic acid with heating. On cooling to room temperature hexahedral plates separated out.
Estimated Errors:
Ambient temperature: Nothing is specified. The compiler estimates that the temperature was controlled to within ±0.5°C.
Experimental Values:
Note: Note: The starting salt was KCHO2·CH2O2.Solubility of potassium formate in formic acid.
| T (°C) | 100w1 | 100x1 | Phase (s) |
|---|---|---|---|
| 0.0 | 36.3 | 23.8 | KCHO2·CH2O2 |
| 19.5 | 38.2 | 25.3 | KCHO2·CH2O2 |
| 39.5 | 40.8 | 27.4 | KCHO2·CH2O2 |
| 60.0 | 44.0 | 30.1 | KCHO2·CH2O2 |
| 70.0 | 45.9 | 31.7 | KCHO2·CH2O2 |
| 90.0 | 52.1 | 37.3 | KCHO2·CH2O2 |
(a) These values were calculated by the compiler.
