SDS Volume (4419)

Volume 72. Nitromethane with Water or Organic Solvents: Ternary and Quaternary Systems, p None

Original Measurements

Friedman, H. L.; J. Am. Chem. Soc. 74, 3294-7 (1954).

Variables:

Room Temp: 298 $\pu{K}$

Prepared by:

V.P. Sazonov

Method/Apparatus/Procedure:

The method was essentially that employed by Eucken and Herzberg [1]. The solvent was degassed by alternately opening to the vacuum pump for 5 to 15 sec. and then stirring very rapidly to produce cavitation. This was repeated 5 to 10 times. In the solubility measurement itself, gas which had been previously saturated with solvent vapor, was admitted to the saturation vessel, holding about 80 mL of soln., and with 5 to 10 mL remaining space, and volume-time measurements were taken and extrapolated back to the time the gas was admitted. Then the stirrer was turned on and driven very fast, producing a slightly (~1%) supersaturated solution. The approach to equilibrium was then followed from each direction while stirring as rapidly as possible without producing cavitation and bubbles.

Source and Purity of Materials:

1. Source not specified; purity not specified; redistilled and dried by filtering at -20°C.
2. Linde Air Products; spectro grade.
3. Conductivity water.

Estimated Errors:

Mass concentration (m/v) (1): relative error of 2-3 determinations less than 3%.

References

¹ Eucken, A.; Herzberg, C.; Z. Phys. Chem. 195, 1 (1950).