SDS Volume
Volume 73. Metal and Ammonium Formate Systems, p None
Source Publication
Sokolov, N. M.; Zh. Obshch. Khim. 24, 1150-6 (1954).
Conditions:
Compiler:
Methodology:
A visual polythermal method was used. The salts were melted in a test tube. The temperatures were measured with a Nichrome-Constantan thermocouple and a 17mV full scale millivoltmeter.
Sample Information:
- Component (1) was synthesized from formic acid and $\ce{NaHCO3}$. Component (2) was a commercially available product and was further purified by the author according to Laiti.
Measurement 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.
System Components:
- Sodium formate, $\ce{ NaCHO2 }$; [141-53-7] NIST WebBook
- Sodium nitrate, $\ce{ NaNO3 }$; [7631-99-4] NIST WebBook
Experimental Data
| $T_{\rm{m}}$ ($\pu{K}$) | $T_{\rm{m}}$ (°C) | $100 x_{2}$ |
|---|---|---|
| 531 | 258 | 0 |
| 525 | 252 | 5 |
| 515 | 242 | 1E+1 |
| 505 | 232 | 15 |
| 487 | 214 | 25 |
| 479 | 206 | 3E+1 |
| 471 | 198 | 35 |
| 465 | 192 | 4E+1 |
| 461 | 188 | 45 |
| 459 | 186 | 49 |
| 463 | 190 | 5E+1 |
| 479 | 206 | 55 |
| 493 | 220 | 6E+1 |
| 508 | 235 | 65 |
| 535 | 262 | 75 |
| 557 | 284 | 85 |
| 575 | 302 | 95 |
| 581 | 308 | 1E+2 |
(a) The T/K values were calculated the compiler.
(b) This is the eutectic.
