SDS Volume
Volume 73. Metal and Ammonium Formate Systems, p None
Source Publication
Bianco, P.; Haladjian, J.; Sabbah, R.; Bull. Soc. Chim. Fr. 7, 2301 (1969).
Conditions:
Room Temp: Composition at 25 °C
Compilers:
St. Trendafilova, Chr. Balarew
Methodology:
The isothermal method was used. The concentration of potassium formate was determined by potentiometric titration. The solid phases were identified thermogravimetrically and by the Schreinemakers' method.
Sample Information:
- Merck p.a. grade formic acid was used. The$\ce{KOH}$ was Riedel de Haen p.a. grade. The water was de-ionized.
Measurement Errors:
Ambient temperature: Accuracy of temperature measurement was ±0.05°C. Solubility error was ±1%.
System Components:
- Potassium formate, $\ce{ KCHO2 }$; [590-29-4] NIST WebBook
- Potassium hydroxide, $\ce{ KOH }$; [1310-58-3] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
| 100w1+2 | 100w2 | 100w1 | m2 (mol/kg) | m1 (mol/kg) | Phase (s) () |
|---|---|---|---|---|---|
| 1.32 | 1.57 | 76.64 | 1.28 | 41.82 | A |
| 3.88 | 4.62 | 71.41 | 3.44 | 35.42 | A |
| 13.42 | 15.98 | 52.79 | 9.12 | 20.10 | A |
| 18.78 | 22.36 | 44.88 | 12.16 | 16.29 | A |
| 29.29 | 34.88 | 29.04 | 17.23 | 9.57 | A |
| 34.87 | 41.53 | 22.72 | 20.70 | 7.56 | A |
| 38.67 | 46.05 | 14.89 | 21.01 | 4.53 | A |
| 40.45 | 48.17 | 11.86 | 21.48 | 3.53 | A + B |
| 42.67 | 50.81 | 6.25 | 21.09 | 1.73 | B |
| 44.89 | 53.46 | 0.0 | 20.47 | 0.0 | - |
| 45.24 | 53.85 | 0.0 | 20.80 | 0.0 | - |
(a) These values were calculated by the compilers.
(b) The solid phases are: A = KCHO2; B = KOH·2H2O.
