Mixture of Sodium sulfate + Water + Potassium sulfate

Datasets

1. (Relative) activity (2)
2. Mass fraction (6)
3. η - Viscosity, Pa*s (2)
4. n₀ - Refractive index (Na D-line) (2)
5. ρ_l - Mass density, kg/m3 (2)

(Relative) activity of Water (2) [ref]

Operational conditions:

• Temperature, K = 298.15 (Liquid)
• Pressure, kPa = 100 (Liquid)

Fixed		Measured
Molality, mol/kg of Sodium sulfate (1) - Liquid	Molality, mol/kg of Potassium sulfate (3) - Liquid	(Relative) activity of Water (2) - Liquid
0.1000	0.4000	0.9815
0.1100	0.4400	0.9798
0.1200	0.4800	0.9782
0.1300	0.5200	0.9766
0.1400	0.5600	0.9750
0.1500	0.6000	0.9736
0.1600	0.6400	0.9720
0.1700	0.6800	0.9705
0.1000	0.1000	0.9920
0.1500	0.1500	0.9884
0.2000	0.2000	0.9850
0.2500	0.2500	0.9817
0.3000	0.3000	0.9785
0.3500	0.3500	0.9754
0.4000	0.4000	0.9723
0.4500	0.4500	0.9698
0.5000	0.5000	0.9665
0.5500	0.5500	0.9636
0.6000	0.6000	0.9607
0.4000	0.1000	0.9816
0.6000	0.1500	0.9737
0.8000	0.2000	0.9661
1.0000	0.2500	0.9585
1.2	0.3000	0.9510
1.4	0.3500	0.9430
1.6	0.4000	0.9360
1.8	0.4500	0.9280
2.0	0.5000	0.9200

(Relative) activity of Water (2) [ref]

Operational conditions:

• Temperature, K = 298.15 (Liquid)
• Pressure, kPa = 100 (Liquid)

Fixed		Measured
Molality, mol/kg of Sodium sulfate (1) - Liquid	Molality, mol/kg of Potassium sulfate (3) - Liquid	(Relative) activity of Water (2) - Liquid
0.1000	0.4000	0.9815
0.1100	0.4400	0.9798
0.1200	0.4800	0.9782
0.1300	0.5200	0.9766
0.1400	0.5600	0.9750
0.1500	0.6000	0.9736
0.1600	0.6400	0.9720
0.1700	0.6800	0.9705
0.1000	0.1000	0.9920
0.1500	0.1500	0.9884
0.2000	0.2000	0.9850
0.2500	0.2500	0.9817
0.3000	0.3000	0.9785
0.3500	0.3500	0.9754
0.4000	0.4000	0.9723
0.4500	0.4500	0.9698
0.5000	0.5000	0.9665
0.5500	0.5500	0.9636
0.6000	0.6000	0.9607
0.4000	0.1000	0.9816
0.6000	0.1500	0.9737
0.8000	0.2000	0.9661
1.0000	0.2500	0.9585
1.2	0.3000	0.9510
1.4	0.3500	0.9430
1.6	0.4000	0.9360
1.8	0.4500	0.9280
2.0	0.5000	0.9200

Mass fraction of Potassium sulfate (3) [ref]

Operational conditions:

• Temperature, K = 313.15 (Liquid)
• Pressure, kPa = 88.4 (Liquid)

Mass fraction of Sodium sulfate (1) - Liquid	Mass fraction of Potassium sulfate (3) - Liquid
0.0000	0.1290
0.0255	0.1273
0.0359	0.1257
0.0549	0.1264

Mass fraction of Potassium sulfate (3) [ref]

Operational conditions:

• Temperature, K = 313.15 (Liquid)
• Pressure, kPa = 88.4 (Liquid)

Mass fraction of Sodium sulfate (1) - Liquid	Mass fraction of Potassium sulfate (3) - Liquid
0.0549	0.1264
0.0782	0.1137
0.0920	0.1040
0.1115	0.0992
0.1339	0.0895
0.1521	0.0853
0.1840	0.0789
0.2144	0.0709
0.2362	0.0651
0.2583	0.0646
0.2918	0.0510

Mass fraction of Potassium sulfate (3) [ref]

Operational conditions:

• Temperature, K = 313.15 (Liquid)
• Pressure, kPa = 88.4 (Liquid)

Mass fraction of Sodium sulfate (1) - Liquid	Mass fraction of Potassium sulfate (3) - Liquid
0.2918	0.0510
0.3023	0.0330
0.3237	0.0000

Mass fraction of Potassium sulfate (3) [ref]

Operational conditions:

• Temperature, K = 313.15 (Liquid)
• Pressure, kPa = 88.4 (Liquid)

Mass fraction of Sodium sulfate (1) - Liquid	Mass fraction of Potassium sulfate (3) - Liquid
0.0000	0.1290
0.0255	0.1273
0.0359	0.1257
0.0549	0.1264

Mass fraction of Potassium sulfate (3) [ref]

Operational conditions:

• Temperature, K = 313.15 (Liquid)
• Pressure, kPa = 88.4 (Liquid)

Mass fraction of Sodium sulfate (1) - Liquid	Mass fraction of Potassium sulfate (3) - Liquid
0.0549	0.1264
0.0782	0.1137
0.0920	0.1040
0.1115	0.0992
0.1339	0.0895
0.1521	0.0853
0.1840	0.0789
0.2144	0.0709
0.2362	0.0651
0.2583	0.0646
0.2918	0.0510

Mass fraction of Potassium sulfate (3) [ref]

Operational conditions:

• Temperature, K = 313.15 (Liquid)
• Pressure, kPa = 88.4 (Liquid)

Mass fraction of Sodium sulfate (1) - Liquid	Mass fraction of Potassium sulfate (3) - Liquid
0.2918	0.0510
0.3023	0.0330
0.3237	0.0000

Viscosity, Pa*s [ref]

Operational conditions:

• Temperature, K = 313.15 (Liquid)
• Pressure, kPa = 88.4 (Liquid)

Fixed		Measured
Mass fraction of Sodium sulfate (1) - Liquid	Mass fraction of Potassium sulfate (3) - Liquid	Viscosity, Pa*s - Liquid
0.0000	0.1290	0.0008
0.0255	0.1273	0.0008
0.0359	0.1257	0.0009
0.0549	0.1264	0.0009
0.0782	0.1137	0.0010
0.0920	0.1040	0.0011
0.1115	0.0992	0.0012
0.1339	0.0895	0.0013
0.1521	0.0853	0.0015
0.1840	0.0789	0.0016
0.2144	0.0709	0.0019
0.2362	0.0651	0.0021
0.2583	0.0646	0.0022
0.2918	0.0510	0.0029
0.3023	0.0330	0.0029
0.3237	0.0000	0.0029

Viscosity, Pa*s [ref]

Operational conditions:

• Temperature, K = 313.15 (Liquid)
• Pressure, kPa = 88.4 (Liquid)

Fixed		Measured
Mass fraction of Sodium sulfate (1) - Liquid	Mass fraction of Potassium sulfate (3) - Liquid	Viscosity, Pa*s - Liquid
0.0000	0.1290	0.0008
0.0255	0.1273	0.0008
0.0359	0.1257	0.0009
0.0549	0.1264	0.0009
0.0782	0.1137	0.0010
0.0920	0.1040	0.0011
0.1115	0.0992	0.0012
0.1339	0.0895	0.0013
0.1521	0.0853	0.0015
0.1840	0.0789	0.0016
0.2144	0.0709	0.0019
0.2362	0.0651	0.0021
0.2583	0.0646	0.0022
0.2918	0.0510	0.0029
0.3023	0.0330	0.0029
0.3237	0.0000	0.0029

Refractive index (Na D-line) [ref]

Operational conditions:

• Temperature, K = 313.15 (Liquid)
• Pressure, kPa = 88.4 (Liquid)

Fixed		Measured
Mass fraction of Sodium sulfate (1) - Liquid	Mass fraction of Potassium sulfate (3) - Liquid	Refractive index (Na D-line) - Liquid
0.0000	0.1290	1.3466
0.0255	0.1273	1.3489
0.0359	0.1257	1.352
0.0549	0.1264	1.3536
0.0782	0.1137	1.3548
0.0920	0.1040	1.359
0.1115	0.0992	1.3595
0.1339	0.0895	1.3614
0.1521	0.0853	1.3648
0.1840	0.0789	1.3684
0.2144	0.0709	1.371
0.2362	0.0651	1.3729
0.2583	0.0646	1.3747
0.2918	0.0510	1.3799
0.3023	0.0330	1.3787
0.3237	0.0000	1.3774

Refractive index (Na D-line) [ref]

Operational conditions:

• Temperature, K = 313.15 (Liquid)
• Pressure, kPa = 88.4 (Liquid)

Fixed		Measured
Mass fraction of Sodium sulfate (1) - Liquid	Mass fraction of Potassium sulfate (3) - Liquid	Refractive index (Na D-line) - Liquid
0.0000	0.1290	1.3466
0.0255	0.1273	1.3489
0.0359	0.1257	1.352
0.0549	0.1264	1.3536
0.0782	0.1137	1.3548
0.0920	0.1040	1.359
0.1115	0.0992	1.3595
0.1339	0.0895	1.3614
0.1521	0.0853	1.3648
0.1840	0.0789	1.3684
0.2144	0.0709	1.371
0.2362	0.0651	1.3729
0.2583	0.0646	1.3747
0.2918	0.0510	1.3799
0.3023	0.0330	1.3787
0.3237	0.0000	1.3774

Mass density, kg/m3 [ref]

Operational conditions:

• Temperature, K = 313.15 (Liquid)
• Pressure, kPa = 88.4 (Liquid)

Fixed		Measured
Mass fraction of Sodium sulfate (1) - Liquid	Mass fraction of Potassium sulfate (3) - Liquid	Mass density, kg/m3 - Liquid
0.0000	0.1290	1097.5
0.0255	0.1273	1115.9
0.0359	0.1257	1138.3
0.0549	0.1264	1150.2
0.0782	0.1137	1159.7
0.0920	0.1040	1175.6
0.1115	0.0992	1189.7
0.1339	0.0895	1203.3
0.1521	0.0853	1228.6
0.1840	0.0789	1253.7
0.2144	0.0709	1279.2
0.2362	0.0651	1290.7
0.2583	0.0646	1302.9
0.2918	0.0510	1345.9
0.3023	0.0330	1336.1
0.3237	0.0000	1317.6

Mass density, kg/m3 [ref]

Operational conditions:

• Temperature, K = 313.15 (Liquid)
• Pressure, kPa = 88.4 (Liquid)

Fixed		Measured
Mass fraction of Sodium sulfate (1) - Liquid	Mass fraction of Potassium sulfate (3) - Liquid	Mass density, kg/m3 - Liquid
0.0000	0.1290	1097.5
0.0255	0.1273	1115.9
0.0359	0.1257	1138.3
0.0549	0.1264	1150.2
0.0782	0.1137	1159.7
0.0920	0.1040	1175.6
0.1115	0.0992	1189.7
0.1339	0.0895	1203.3
0.1521	0.0853	1228.6
0.1840	0.0789	1253.7
0.2144	0.0709	1279.2
0.2362	0.0651	1290.7
0.2583	0.0646	1302.9
0.2918	0.0510	1345.9
0.3023	0.0330	1336.1
0.3237	0.0000	1317.6

Sources

• Investigation of Solid Liquid Equilibria on the System Na+, K+//Cl , SO42 H2O and Na+, K+// SO42 H2O at 313.15 K
• Thermodynamic Properties of Aqueous-Mixed Electrolyte Solutions of {y Na2SO4 + (1 - y) K2SO4}(aq)