Compilation - Sodium formate with Sodium nitrate (IUPAC SDS Volume 73)
SDS Volume (4754)
Volume 73. Metal and Ammonium Formate Systems, p None
Original Measurements
Tsindrik, N. M.; Zh. Obshch. Khim. 28, 830-4 (1958).
Variables:
Prepared by:
Method/Apparatus/Procedure:
A visual polythermal method was used. The salts were melted in a test tube and hand stirred. The temperatures were measured with a Nichrome-Constantan thermocouple.
Source and Purity of Materials:
- Analytical grade materials were recrystallized twice. Component (1) undergoes a solid state transition at 242°C [1]. Component (2) undergoes a solid state transition at 275°C.
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:
- Sodium formate, $\ce{ NaCHO2 }$; [141-53-7] NIST WebBook
- Sodium nitrate, $\ce{ NaNO3 }$; [7631-99-4] NIST WebBook
Experimental Data
Note: There is a eutectic at 187°C and 100 x2 = 48.
Melting temperatures for different mole fractions
| $T_{\rm{m}}$ ($\pu{K}$) | $T_{\rm{m}}$ (°C) | $100 x_{2}$ |
|---|---|---|
| 531 | 258 | 0 |
| 525 | 252 | 5 |
| 519 | 245 | 1E+1 |
| 509 | 236 | 15 |
| 499 | 226 | 2E+1 |
| 492 | 219 | 25 |
| 485 | 212 | 3E+1 |
| 477 | 204 | 35 |
| 469 | 196 | 4E+1 |
| 461 | 188 | 45 |
| 465 | 192 | 5E+1 |
| 483 | 210 | 55 |
| 499 | 226 | 6E+1 |
| 513 | 240 | 65 |
| 523 | 250 | 7E+1 |
| 533 | 260 | 75 |
| 543 | 270 | 8E+1 |
| 551 | 278 | 85 |
| 561 | 288 | 9E+1 |
| 571 | 198 | 95 |
| 581 | 308 | 1E+2 |
(a) The T/K values were calculated the compiler.
