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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
Ethanol with Hexane (n-hexane) with Water
Components:
(1) Water; H2O; [7732-18-5]
NIST Chemistry WebBook
for detail
(2) Ethanol (ethyl alcohol); C2H6O; [64-17-5]
NIST Chemistry WebBook
for detail
(3) Hexane (n-hexane); C6H14; [110-54-3]
NIST Chemistry WebBook
for detail
Original Measurements:
Vorobeva, A.I.; Karapetyants, M., Kh., Zh. Fiz. Khim. 40, 3018 (1966).
Variables:
Temperature = 298 K
Prepared By:
A. Skrzecz
Experimental Data:
(Notes on the Nomenclature)
Compositions along the saturation curve
t/°C
T/K
Mass Fraction w
1
Mass Fraction w
2
Mole Fraction x
1
(compiler)
Mole Fraction x
2
(compiler)
25
298.2
0.000
0.999
0.0000
0.9952
25
298.2
0.134
0.860
0.2200
0.7548
25
298.2
0.225
0.763
0.3391
0.6147
25
298.2
0.346
0.630
0.465
0.4526
25
298.2
0.421
0.547
0.5294
0.3677
25
298.2
0.509
0.447
0.5915
0.2777
25
298.2
0.525
0.429
0.6021
0.2630
25
298.2
0.595
0.345
0.6378
0.1977
25
298.2
0.655
0.265
0.6542
0.1415
25
298.2
0.713
0.164
0.6393
0.0786
25
298.2
0.717
0.155
0.6361
0.0735
25
298.2
0.724
0.124
0.6141
0.0562
25
298.2
0.697
0.059
0.5153
0.0233
25
298.2
0.618
0.026
0.4007
0.0090
25
298.2
0.504
0.013
0.2886
0.0040
25
298.2
0.325
0.002
0.1588
0.0005
Compositions of coexisting phases
t/°C
T/K
Mass Fraction w
1
Mass Fraction w
2
Mole Fraction x
1
(compiler)
Mole Fraction x
2
(compiler)
Comment(s)
25
298.2
0.007
0.992
0.013
0.982
hydrocarbon-rich phase
25
298.2
0.036
0.962
0.065
0.926
hydrocarbon-rich phase
25
298.2
0.072
0.925
0.125
0.861
hydrocarbon-rich phase
25
298.2
0.124
0.870
0.205
0.769
hydrocarbon-rich phase
25
298.2
0.196
0.794
0.303
0.657
hydrocarbon-rich phase
25
298.2
0.241
0.746
0.358
0.593
hydrocarbon-rich phase
25
298.2
0.270
0.714
0.390
0.551
hydrocarbon-rich phase
25
298.2
0.288
0.694
0.408
0.526
hydrocarbon-rich phase
25
298.2
0.360
0.615
0.478
0.437
hydrocarbon-rich phase
25
298.2
0.518
0.015
0.301
0.005
water-rich phase
25
298.2
0.714
0.086
0.562
0.036
water-rich phase
25
298.2
0.707
0.179
0.646
0.087
water-rich phase
25
298.2
0.653
0.270
0.657
0.145
water-rich phase
25
298.2
0.558
0.388
0.618
0.230
water-rich phase
25
298.2
0.499
0.458
0.584
0.287
water-rich phase
25
298.2
0.466
0.496
0.563
0.320
water-rich phase
25
298.2
0.450
0.514
0.551
0.336
water-rich phase
25
298.2
0.360
0.615
0.478
0.437
water-rich phase
Method/Apparatus/Procedure:
The titration method, Ref. 1, was used to determine solubility of the mixtures. The third component was added to the binary homogeneous mixture until cloudiness was first observed. Density of the saturated mixtures was measured; these results were graphed. To obtain equilibrium, ternary mixtures were stirred in a thermostat vessel for several hours. After phase separation, the density of each phase was measured and composition was determined from the graphs prepared earlier. Concentration at the critical point was found by method described in Ref. 2. Water included in ethanol was taken into account in all measurements.
Source and Purity of Materials:
(1) Source not specified, "rectificate grade," distilled; water concentration was determined by the Karl Fischer method.
(2) Source not specified; b.p.=68.7°C, n(20°C,D)=1.3753.
(3) Source not specified.
Estimated Errors:
Solubility: Not reported.
Temperature: Solubility ±0.001 mass fraction.
References:
1
W. D. Bancroft, Phys. Rev. 3, 21 (1896).
2
E. N. Zilberman, Zh. Fiz. Khim. 26, 1458 (1952).