IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Nitromethane with Acetic acid and Water

Components:
   (1) Acetic acid; C2H4O2; [64-19-7]  NIST Chemistry WebBook for detail
   (2) Nitromethane; CH3NO2 ; [75-52-5]  NIST Chemistry WebBook for detail
   (3) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail

Original Measurements:
   Maslovskaya, N. V.; Dissertation, Kalinin University, 1974.

Variables:
   Temperature = 293 K and 313 K

Prepared By:
   V. P. Sazonov

Experimental Remarks:

   Estimated plait point: w₁ = 0.509, w₂ = 0.180 (x₁ = 0.292, x₂ = 0.105, compiler).

Experimental Data:   (Notes on the Nomenclature)

Table 1. Mutual solubility of nitromethane, acetic acid and water
t/°C	T/K	Mass Fraction w₁	Mass Fraction w₂	Mole Fraction x₁ (compiler)	Mole Fraction x₂ (compiler)
40.0	313.2	0.1000	0.0000	0.0320	0.0000
40.0	313.2	0.1408	0.0395	0.0476	0.0136
40.0	313.2	0.1800	0.0866	0.0654	0.0320
40.0	313.2	0.2170	0.1271	0.0845	0.0503
40.0	313.2	0.2585	0.1535	0.1074	0.0649
40.0	313.2	0.3275	0.1708	0.1488	0.0789
40.0	313.2	0.3295	0.1805	0.1517	0.0844
40.0	313.2	0.3660	0.1818	0.1758	0.0887
40.0	313.2	0.4085	0.1830	0.2065	0.0940
40.0	313.2	0.4380	0.1850	0.2302	0.0988
40.0	313.2	0.4915	0.1805	0.2752	0.1027
40.0	313.2	0.5440	0.1758	0.3254	0.1069
40.0	313.2	0.6420	0.1558	0.4323	0.1066
40.0	313.2	0.6890	0.1382	0.4870	0.0993
40.0	313.2	0.7600	0.1035	0.5725	0.0792
40.0	313.2	0.8520	0.0566	0.6989	0.0472
40.0	313.2	0.9600	0.0000	0.8760	0.0000

Table 2. Compositions of coexisting phases
t/°C	T/K	Mass Fraction w₁	Mass Fraction w₂	Mole Fraction x₁ (compiler)	Mole Fraction x₂ (compiler)	Comment(s)
20.0	293.2	0.960	0.015	0.906	0.014	nitromethane-rich phase
20.0	293.2	0.936	0.031	0.867	0.029	nitromethane-rich phase
20.0	293.2	0.907	0.050	0.822	0.046	nitromethane-rich phase
20.0	293.2	0.878	0.070	0.780	0.063	nitromethane-rich phase
20.0	293.2	0.874	0.072	0.773	0.065	nitromethane-rich phase
20.0	293.2	0.837	0.095	0.719	0.083	nitromethane-rich phase
20.0	293.2	0.815	0.110	0.690	0.095	nitromethane-rich phase
20.0	293.2	0.790	0.125	0.656	0.105	nitromethane-rich phase
40.0	313.2	0.953	0.005	0.866	0.005	nitromethane-rich phase
40.0	313.2	0.902	0.032	0.779	0.028	nitromethane-rich phase
40.0	313.2	0.860	0.054	0.713	0.046	nitromethane-rich phase
40.0	313.2	0.834	0.068	0.675	0.056	nitromethane-rich phase
40.0	313.2	0.813	0.077	0.643	0.062	nitromethane-rich phase
40.0	313.2	0.778	0.093	0.594	0.072	nitromethane-rich phase
40.0	313.2	0.745	0.110	0.553	0.083	nitromethane-rich phase
20.0	293.2	0.100	0.030	0.033	0.010	water-rich phase
20.0	293.2	0.131	0.094	0.046	0.034	water-rich phase
20.0	293.2	0.161	0.152	0.062	0.059	water-rich phase
20.0	293.2	0.204	0.200	0.084	0.084	water-rich phase
20.0	293.2	0.220	0.215	0.094	0.093	water-rich phase
20.0	293.2	0.252	0.241	0.114	0.111	water-rich phase
20.0	293.2	0.268	0.250	0.124	0.118	water-rich phase
20.0	293.2	0.324	0.265	0.163	0.136	water-rich phase
40.0	313.2	0.115	0.021	0.038	0.007	water-rich phase
40.0	313.2	0.168	0.080	0.060	0.029	water-rich phase
40.0	313.2	0.205	0.115	0.078	0.045	water-rich phase
40.0	313.2	0.240	0.140	0.097	0.057	water-rich phase
40.0	313.2	0.262	0.155	0.109	0.066	water-rich phase
40.0	313.2	0.289	0.169	0.126	0.075	water-rich phase
40.0	313.2	0.310	0.176	0.139	0.080	water-rich phase

Notes:

Method/Apparatus/Procedure:
   Two methods were used. The solubility curve was determined by the titration method. The analytical method was used, samples being withdrawn from coexisting liquid phases at equilibrium for analysis by refractometry.

Source and Purity of Materials:
   (1) Source not specified, pure grade reagent; distilled; b. p. = 101.0 °C, n(20 °C, D) = 1.3818, d(20 °C, 4 °C) = 1.1385.
   (2) Source not specified, pure grade reagent; distilled; b. p. = 117.1 °C; n(20 °C, D) = 1.3723, d(20 °C, 4 °C) = 1.0530.
   (3) Doubly distilled.

Estimated Errors:

   Temperature: Not reported.