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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
Ethanol with Benzene and Water
Components:
(1) Water; H2O; [7732-18-5]
NIST Chemistry WebBook
for detail
(2) Benzene; C6H6; [71-43-2]
NIST Chemistry WebBook
for detail
(3) Ethanol (ethyl alcohol); C2H6O; [64-17-5]
NIST Chemistry WebBook
for detail
Original Measurements:
Chang, Y.C.; Moulton, R.W., Ind. Eng. Chem. 45, 2350 (1953).
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)
25.0
298.2
0.2600
0.0043
0.1213
0.0012
25.0
298.2
0.3080
0.0095
0.1496
0.0027
25.0
298.2
0.3458
0.0129
0.1735
0.0038
25.0
298.2
0.4711
0.0521
0.2737
0.0179
25.0
298.2
0.5171
0.1242
0.3430
0.0486
25.0
298.2
0.5160
0.2320
0.3978
0.1055
25.0
298.2
0.4860
0.3235
0.4175
0.1639
25.0
298.2
0.4310
0.4342
0.4177
0.2482
25.0
298.2
0.3529
0.5580
0.3879
0.3617
25.0
298.2
0.2241
0.7359
0.2947
0.5708
25.0
298.2
0.1880
0.7830
0.2597
0.6379
25.0
298.2
0.0980
0.8919
0.1508
0.8094
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)
25.0
298.2
0.0186
0.9800
0.0310
0.9630
hydrocarbon-rich phase
25.0
298.2
0.0385
0.9582
0.0629
0.9233
hydrocarbon-rich phase
25.0
298.2
0.0621
0.9332
0.0994
0.8813
hydrocarbon-rich phase
25.0
298.2
0.0791
0.9125
0.1238
0.8425
hydrocarbon-rich phase
25.0
298.2
0.1100
0.8781
0.1671
0.7867
hydrocarbon-rich phase
25.0
298.2
0.1468
0.8350
0.2141
0.7181
hydrocarbon-rich phase
25.0
298.2
0.1821
0.7915
0.2542
0.6516
hydrocarbon-rich phase
25.0
298.2
0.2230
0.7400
0.2957
0.5788
hydrocarbon-rich phase
25.0
298.2
0.2358
0.7241
0.3081
0.5579
hydrocarbon-rich phase
25.0
298.2
0.3085
0.6201
0.3601
0.4268
hydrocarbon-rich phase
25.0
298.2
0.3765
0.5210
0.3980
0.3248
hydrocarbon-rich phase
25.0
298.2
0.1561
0.0019
0.0676
0.0005
water-rich phase
25.0
298.2
0.3001
0.0065
0.1445
0.0018
water-rich phase
25.0
298.2
0.3850
0.0171
0.2001
0.0052
water-rich phase
25.0
298.2
0.4400
0.0288
0.2424
0.0094
water-rich phase
25.0
298.2
0.4975
0.0895
0.3097
0.0329
water-rich phase
25.0
298.2
0.5228
0.1521
0.3621
0.0621
water-rich phase
25.0
298.2
0.5172
0.2273
0.3964
0.1028
water-rich phase
25.0
298.2
0.4995
0.2911
0.4140
0.1423
water-rich phase
25.0
298.2
0.4885
0.3185
0.4176
0.1606
water-rich phase
25.0
298.2
0.4342
0.4289
0.4186
0.2439
water-rich phase
25.0
298.2
0.3765
0.5210 (a)
0.3980
0.3248
water-rich phase
Notes:
a
Plait point.
Method/Apparatus/Procedure:
The cloud point method, as described in Ref. 1, was used. Binary-alcohol benzenes were titrated with water to a sudden appearance of cloudiness. The end point was observed against a bright light as a background. Refractive indexes were measured at 25.5°C with an Abbe refractometer. To obtain equilibrium, mixtures of known composition were overheated to about 35°C and placed into a thermostat. When equilibrium was reached and the layers were clear in a bright light, phases were sampled, refractive indexes at 25.5°C were measured and compositions were determined on the basis of charts obtained in saturation studies.
Source and Purity of Materials:
(1) Source not specified, absolute alcohol; dehydrated by magnesium ethoxide method; b.p.=78.3°C; n(25°C,D)=1.3596; d(25°C,4°C)=0.7851.
(2) Source not specified, reagent grade; dehydrated with Na wire, distilled; b.p.=80.1°C; n(25°C,D)=1.4978; d(25°C,4°C)=0.8725.
(3) Distilled.
Estimated Errors:
Solubility: Not reported.
Temperature: Temp. ±0.1°C (temperature of the bath), composition accuracy 0.5% in the center part of the binary curve.
References:
1
S. F. Taylor, J. Phys. Chem. 1, 461 (1897).