SDS Volume
Volume 73. Metal and Ammonium Formate Systems, p None
Source Publication
Itkina, L. S.; Petrova, E. V.; Russ. J. Inorg. Chem. 27, 294-6 (1982).
Conditions:
Room Temp: Composition at 25 °C
Compilers:
St. Trendafilova, Chr. Balarew
Methodology:
The isothermal method was used. Two weeks were allowed for equilibration. The potassium content was determined by flame photometry. Formate ion content was determined permanganometrically. Sodium ion content was determined by the difference. The composition of the solid phases was determined by Schreinemakers' method.
Sample Information:
- The sodium and potassium formates were prepared by neutralizing formic acid with the corresponding pro analysis grade hydroxides.
Measurement Errors:
Ambient temperature: No information is given.
Mass concentration (m/v) (1): No information is given.
System Components:
- Sodium formate, $\ce{ NaCHO2 }$; [141-53-7] NIST WebBook
- Potassium formate, $\ce{ KCHO2 }$; [590-29-4] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
| 100w1 | 100w2 | m1 (mol/kg) | m2 (mol/kg) | Phase (s) () |
|---|---|---|---|---|
| 50.97 | - | 15.28 | - | A |
| 49.10 | 2.62 | 14.95 | 0.645 | A |
| 27.12 | 29.15 | 9.117 | 7.926 | A |
| 21.80 | 53.03 | 12.73 | 25.05 | A |
| 23.51 | 56.95 | 17.69 | 34.66 | A + B |
| 22.98 | 55.18 | 15.47 | 30.04 | B |
| 19.94 | 57.31 | 12.89 | 29.95 | B |
| 14.48 | 61.40 | 8.826 | 30.27 | B |
| 12.86 | 62.43 | 7.651 | 30.04 | B |
| 10.33 | 67.42 | 6.825 | 36.03 | B |
| 5.84 | 74.41 | 4.35 | 44.80 | B + C |
| 2.95 | 72.91 | 1.80 | 35.91 | C |
| 3.32 | 73.94 | 2.15 | 38.66 | C |
| - | 81.82 | - | 53.51 | C |
(a) The molality values were calculated by the compilers.
(b) The solid phases are: A = NaCHO2; B = NaCHO2ยท2.5KCHO2; C = KCHO2.
