SDS Volume (4761)
Volume 73. Metal and Ammonium Formate Systems, p None
Original Measurements
Sokolov, N. M.; Zh. Obshch. Khim. 45, 1897-1902 (1965).
Variables:
Prepared by:
Method/Apparatus/Procedure:
A visual polythermal method was used.
Source and Purity of Materials:
- No information is given. Component (1) undergoes phase transitions at 60, 135 and 157°C [1]. Component (2) undergoes pohast transition at 58 and 150°C [1].
Estimated Errors:
Ambient temperature: The compiler estimates the accuracy of the temperature measurements to be probably ±2 K.
Mass concentration (m/v) (1): No information is given.
References
1 Sokolov, N. M.; Tezisy Dokl. X Nauch. Konf. S. M. I. (1956).
Components:
- Potassium formate, $\ce{ KCHO2 }$; [590-29-4] NIST WebBook
- Potassium acetate, $\ce{ KC2H3O2 }$; [127-08-2] NIST WebBook
Experimental Data
Note: A eutectic is present at 151°C and 100 x2 = 13.
Melting temperatures for different mole fractions
| $T_{\rm{m}}$ ($\pu{K}$) | $T_{\rm{m}}$ (°C) | $100 x_{2}$ |
|---|---|---|
| 440 | 167 | 0 |
| 430 | 157 | 5 |
| 427 | 154 | 1E+1 |
| 430 | 157 | 15 |
| 441 | 168 | 2E+1 |
| 452 | 179 | 25 |
| 461 | 188 | 3E+1 |
| 472 | 199 | 35 |
| 482 | 209 | 4E+1 |
| 490 | 217 | 45 |
| 497 | 224 | 5E+1 |
| 505 | 232 | 55 |
| 513 | 240 | 6E+1 |
| 522 | 249 | 65 |
| 530 | 257 | 7E+1 |
| 539 | 266 | 75 |
| 546 | 273 | 8E+1 |
| 555 | 282 | 85 |
| 563 | 290 | 9E+1 |
| 570 | 297 | 95 |
| 575 | 302 | 1E+2 |
(a) The T/K values were calculated the compiler.
