SDS Volume (5079)
Volume 78. Acetonitrile Binary Systems, p None
Original Measurements
Smagowski, H.; Zesz. Nauk. Wydz. Mat., Fiz. Chem., Univ. Gdanski, Chem. 3, 45-53 (1974).
Variables:
Room Temp: 298 $\pu{K}$
Prepared by:
Method/Apparatus/Procedure:
The titration method was used: 25 mL of (1) and an amount of (2) exceeding the solubility were placed in 50 mL volumetric flasks. The flasks were closed by ground glass stoppers and stored at the required temperature in a thermostat for 45 hours, with intensive stirring every several hours. After this, 2 mL samples of the saturated solution were taken by pipette, diluted to 25 mL with water-less acetic acid and titrated by $\pu{0.05 N} \ce{HClO4}$ by using crystal violet indicator.
Source and Purity of Materials:
- Source not specified; purity not specified; dried over anhydrous $\ce{K2CO3}$ and repeatedly distilled over $\ce{P2O5}$.
- Obtained by mixing of methanol solutions of sodium hydroxide and the acid in stoichiometric amounts; purified by crystallization from a mixture of water and methanol; purity not less 99 mass%.
Estimated Errors:
Ambient temperature: Not reported.
Mass concentration (m/v) (1): Not reported.
References
1 Timmermans, J.; Physico-Chemical Constants of Pure Organic Compounds (Elsevier, New York, 1950).
Components:
- Acetonitrile, $\ce{ C2H3N }$; [75-05-8] NIST WebBook
- Sodium hydrogen oxalate, $\ce{ C2HNaO4 }$; [1186-49-8] NIST WebBook
- Sodium hydrogen malonate, $\ce{ C3H3NaO4 }$; [2922-55-6] NIST WebBook
- Sodium hydrogen succinate, $\ce{ C4H5NaO4 }$; [2922-54-5] NIST WebBook
- Sodium hydrogen glutarate, $\ce{ C5H7NaO4 }$; [3343-88-2] NIST WebBook
- Sodium hydrogen adipate, $\ce{ C6H9NaO4 }$; [18996-34-4] NIST WebBook
- Monosodium pimelate, $\ce{ C7H11NaO4 }$; [6142-21-8] NIST WebBook
- Monosodium suberate, $\ce{ C8H13NaO4 }$; [27796-70-9] NIST WebBook
- Sodium hydrogen azelate, $\ce{ C9H15NaO4 }$; [17356-30-8] NIST WebBook
- Sodium hydrogen sebacate, $\ce{ C10H17NaO4 }$; [19455-73-3] NIST WebBook
Experimental Data
Solubility of monosodium salts of dicarboxylic acids (2) in acetonitrile (1) at 25.0 oC (298.2 K compiler)
| $C_{1}$ (mol/L) | 100w2 | $x_{2}$ |
|---|---|---|
| 9 x 10-3 | 1.3 x 10-3 | 5 x 10-4 |
| 8 x 10-3 | 1.3 x 10-3 | 4 x 10-4 |
| 6 x 10-3 | 1.0 x 10-3 | 3 x 10-4 |
| 0.012 | 2.3 x 10-3 | 6 x 10-4 |
| 7 x 10-3 | 1.5 x 10-3 | 4 x 10-4 |
| 7 x 10-3 | 1.6 x 10-3 | 4 x 10-4 |
| 6 x 10-3 | 1.5 x 10-3 | 3 x 10-4 |
| 5 x 10-3 | 1.3 x 10-3 | 3 x 10-4 |
| 4 x 10-3 | 1.1 x 10-3 | 2 x 10-4 |
(a) For these calculations the compiler assumed that the densities of the solutions were those of acetonitrile1 at the specified temperatures.
