Home
Introduction
Search Menu
IUPAC Series (PDF)
Reference
Version History
About the Project
Disclaimer
Contact Us
Acknowledgements
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:
Washburn, E.R., Hnizda, V.; Vold, R., J. Am. Chem. Soc. 53, 3237 (1931).
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)
24.5
297.7
0.082
0.911
0.1287
0.8432
24.5
297.7
0.100
0.890
0.1537
0.8070
24.5
297.7
0.129
0.857
0.1925
0.7541
24.5
297.7
0.179
0.795
0.2506
0.6564
24.5
297.7
0.253
0.702
0.3235
0.5294
24.5
297.7
0.291
0.646
0.3493
0.4571
24.5
297.7
0.343
0.570
0.3804
0.3728
24.5
297.7
0.416
0.462
0.4158
0.2723
24.5
297.7
0.448
0.398
0.4161
0.2180
24.5
297.7
0.504
0.279
0.4119
0.1345
24.5
297.7
0.518
0.230
0.3991
0.1045
24.5
297.7
0.512
0.114
0.3334
0.0438
24.5
297.7
0.466
0.051
0.2692
0.0174
24.5
297.7
0.374
0.021
0.1934
0.0064
24.5
297.7
0.299
0.0083
0.1441
0.0024
24.5
297.7
0.258
0.0057
0.1203
0.0016
Distribution of ethanol in ethanol-benzene-water system
t/°C
T/K
Mass Fraction w
1
Comment(s)
25.0
298.2
0.007
hydrocarbon-rich phase
25.0
298.2
0.012
hydrocarbon-rich phase
25.0
298.2
0.016
hydrocarbon-rich phase
25.0
298.2
0.024
hydrocarbon-rich phase
25.0
298.2
0.039
hydrocarbon-rich phase
25.0
298.2
0.054
hydrocarbon-rich phase
25.0
298.2
0.070
hydrocarbon-rich phase
25.0
298.2
0.084
hydrocarbon-rich phase
25.0
298.2
0.098
hydrocarbon-rich phase
25.0
298.2
0.025
water-rich phase
25.0
298.2
0.106
water-rich phase
25.0
298.2
0.164
water-rich phase
25.0
298.2
0.243
water-rich phase
25.0
298.2
0.318
water-rich phase
25.0
298.2
0.370
water-rich phase
25.0
298.2
0.405
water-rich phase
25.0
298.2
0.443
water-rich phase
25.0
298.2
0.573
water-rich phase
Method/Apparatus/Procedure:
The titration method was used. Binary alcohol-benzene mixtures of known composition, prepared from calibrated pipettes in 125 mL glass-stoppered bottles, were mixed, and titrated with water to a permanent cloudiness at room temperature (24.5°C). The amount of water was 0.66-5.77 mL (added from a 10 mL burette graduated to 0.01 mL) and 17.1-112.7 mL (added from a calibrated 50 mL burette). The refractive indexes of mixtures were measured at 25.°C by Abbe refractometer and used to construct the plot of refractive index against composition which was further used to find compositions of equilibrium phases. Phase equilibrium data were reported in incomplete form. The mixtures of 25.0 mL of benzene and 25.0 mL of water were shaken and then suspended in the constant temperature bath to reach equilibrium. When the phases were transparent, refractive indexes of each layer were measured and composition of the phases were calculated.
Source and Purity of Materials:
(1) Standard commercial grade of absolute alcohol; dried with CaCO and Ca until density measurements showed it to be better than 99.3%.
(2) Mallinckrodt, reagent quality; dried with Na, distilled.
(3) Redistilled from KMnO
4
.
Estimated Errors:
Solubility: Not reported.
Temperature: Temp. ±0.1°C.