2
0
2017
zha
zho
0
journal
Original
Zhang, Y.[Yan]
Zhou, J.[Juan]
Li, Z.[Zhibao]
J. Chem. Eng. Data
2017
2020-09-29
Solubility of FeSO4*7H2O in the H2SO4 Ti(SO4)2 H2O, H2SO4 MgSO4 H2O, and HCl H2O Systems from 278 to 313 K
The solubilities of FeSO4*7H2O in the H2SO4 Ti(SO4)2 H2O and H2SO4 MgSO4 H2O systems were measured with a dynamic method from 278.15 to 308.15 K. Due to the hydrolysis property of Ti(IV), it was found that the common ion effect of Ti(SO4)2 was not so obvious as that of MgSO4 for the solubility of FeSO4*7H2O. The solubility of FeSO4*7H2O in the HCl H2O system was also measured by same method. The solubility did not change much at first, yet substantially increased when more HCl was added into the solution. New interaction parameters of ions for the mixed-solvent electrolyte (MSE) model were regressed by the experimental solubility data, with the average relative deviations of less than 5.0%. The speciation and the activity coefficients of species in the FeSO4 HCl H2O system with an FeSO4 concentration of 1.0 mol*kg 1 were predicted by the MSE model with the newly regressed parameters at 303.15 K.
Copperas (FeSO4*7H2O)
Solubility
Mixed-Solvent Electrolyte (MSE) model
Ti(SO4)2
HCl
MgSO4
10.1021/acs.jced.6b00783
3
62
973-979
1
InChI=1S/Fe.H2O4S/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+2;/p-2
BAUYGSIQEAFULO-UHFFFAOYSA-L
iron(II) sulfate
ferrous sulfate
sulfuric acid, iron(2+) salt
FeO4S
1
Commercial source
1
99
3
Stated by supplier
2
InChI=1S/ClH/h1H
VEXZGXHMUGYJMC-UHFFFAOYSA-N
hydrogen chloride
ClH
1
Commercial source
1
99
2
Estimated by the compiler
3
InChI=1S/H2O/h1H2
XLYOFNOQVPJJNP-UHFFFAOYSA-N
water
H2O
1
Commercial source
1
99.8
3
Estimated by the compiler
1
2
1
1
1
3
1
Principal objective of the work
EP
EP
2/14/2017
1
Molality, mol/kg
titration
1
Liquid
Direct value, X
3
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Liquid
Crystal of intercomponent compound 1
1
Pressure, kPa
Liquid
100
1
1
Temperature, K
Liquid
2
Molality, mol/kg
2
Liquid
1
293.15
5
2
0.1554
4
1
1.7682
5
1
0.0424
1
293.15
5
2
0.3119
4
1
1.7471
5
1
0.0421
1
293.15
5
2
0.4682
4
1
1.7428
5
1
0.042
1
293.15
5
2
0.6259
4
1
1.7272
5
1
0.0412
1
293.15
5
2
0.7796
4
1
1.7496
5
1
0.0417
1
293.15
5
2
1.1774
5
1
1.707
4
1
0.041
1
293.15
5
2
1.5602
5
1
1.7451
5
1
0.042
1
293.15
5
2
1.9363
5
1
1.7895
5
1
0.0424
1
293.15
5
2
2.3053
5
1
1.8378
5
1
0.0429
1
293.15
5
2
2.6593
5
1
1.9063
5
1
0.0433
1
293.15
5
2
3.0023
5
1
1.9796
5
1
0.0434
1
298.15
5
2
0.1502
4
1
1.9758
5
1
0.0427
1
298.15
5
2
0.3015
4
1
1.9538
5
1
0.0424
1
298.15
5
2
0.4535
4
1
1.9372
5
1
0.0427
1
298.15
5
2
0.6091
4
1
1.8936
5
1
0.0418
1
298.15
5
2
0.7589
4
1
1.9138
5
1
0.0417
1
298.15
5
2
1.1431
5
1
1.8884
5
1
0.042
1
298.15
5
2
1.5134
5
1
1.9309
5
1
0.0424
1
298.15
5
2
1.8727
5
1
1.9915
5
1
0.043
1
298.15
5
2
2.2225
5
1
2.0568
5
1
0.0433
1
298.15
5
2
2.5657
5
1
2.1184
5
1
0.0434
1
298.15
5
2
2.8959
5
1
2.1908
5
1
0.0441
1
303.15
5
2
0.1447
4
1
2.1936
5
1
0.0433
1
303.15
5
2
0.2911
4
1
2.1608
5
1
0.0428
1
303.15
5
2
0.4378
4
1
2.1458
5
1
0.0431
1
303.15
5
2
0.5883
4
1
2.0998
5
1
0.0424
1
303.15
5
2
0.7332
4
1
2.1178
5
1
0.0422
1
303.15
5
2
1.1016
5
1
2.1081
5
1
0.0423
1
303.15
5
2
1.4611
5
1
2.1386
5
1
0.0427
1
303.15
5
2
1.8025
5
1
2.2141
5
1
0.0436
1
303.15
5
2
2.1376
5
1
2.2813
5
1
0.0432
1
303.15
5
2
2.4697
5
1
2.336
4
1
0.044
1
303.15
5
2
2.7765
5
1
2.4275
5
1
0.0449
1
308.15
5
2
0.1392
4
1
2.4128
5
1
0.044
1
308.15
5
2
0.2798
4
1
2.3845
5
1
0.0429
1
308.15
5
2
0.4205
4
1
2.374
4
1
0.043
1
308.15
5
2
0.5664
4
1
2.3178
5
1
0.0429
1
308.15
5
2
0.7052
4
1
2.3399
5
1
0.0424
1
308.15
5
2
1.0617
5
1
2.3191
5
1
0.0425
1
308.15
5
2
1.4078
5
1
2.35
3
1
0.04
1
308.15
5
2
1.7314
5
1
2.4399
5
1
0.0438
1
308.15
5
2
2.0588
5
1
2.4897
5
1
0.0438
1
308.15
5
2
2.3639
5
1
2.5761
5
1
0.045
1
308.15
5
2
2.6605
5
1
2.6577
5
1
0.0447
1
313.15
5
2
0.133
4
1
2.6596
5
1
0.0445
1
313.15
5
2
0.2679
4
1
2.6213
5
1
0.0438
1
313.15
5
2
0.4037
4
1
2.5967
5
1
0.0432
1
313.15
5
2
0.5413
4
1
2.5664
5
1
0.0435
1
313.15
5
2
0.6774
4
1
2.5603
5
1
0.0425
1
313.15
5
2
1.0176
5
1
2.5524
5
1
0.0431
1
313.15
5
2
1.3467
5
1
2.5926
5
1
0.0441
1
313.15
5
2
1.6575
5
1
2.6745
5
1
0.044
1
313.15
5
2
1.9649
5
1
2.7383
5
1
0.0449
1
313.15
5
2
2.2547
5
1
2.8237
5
1
0.0453
1
313.15
5
2
2.5364
5
1
2.9039
5
1
0.0453