Mixture of sodium hydroxide + sodium sulphate + Water

Name: sodium hydroxide
InChI: InChI=1S/Na.H2O/h;1H2/q+1;/p-1
InChI Key: HEMHJVSKTPXQMS-UHFFFAOYSA-M
Formula: HNaO
SMILES: [OH][Na]
Mol. Weight (g/mol): 40.00
CAS: 1310-73-2

Name: sodium sulphate
InChI: InChI=1S/2Na.H2O4S/c;;1-5(2,3)4/h;;(H2,1,2,3,4)/q2*+1;/p-2
InChI Key: PMZURENOXWZQFD-UHFFFAOYSA-L
Formula: Na2O4S
SMILES: O=S(=O)([O-])[O-].[Na+].[Na+]
Mol. Weight (g/mol): 142.04
CAS: 7757-82-6

Name: Water
InChI: InChI=1S/H2O/h1H2
InChI Key: XLYOFNOQVPJJNP-UHFFFAOYSA-N
Formula: H2O
SMILES: O
Mol. Weight (g/mol): 18.02
CAS: 7732-18-5

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Datasets

Mass fraction (3)

Mass fraction of sodium sulphate (2) [ref]

Operational conditions:

Pressure, kPa = 101 (Liquid)
Temperature, K = 353.15 (Liquid)

Mass fraction of sodium hydroxide (1) - Liquid	Mass fraction of sodium sulphate (2) - Liquid
0.0000	0.2502
0.0290	0.2030
0.0652	0.1520
0.0890	0.1257
0.1160	0.0985
0.1719	0.0604
0.2174	0.0367
0.2793	0.0163
0.3296	0.0113
0.3866	0.0079
0.4464	0.0069
0.5059	0.0060
0.5731	0.0041
0.6333	0.0027
0.6869	0.0023
0.7297	0.0006

Mass fraction of sodium sulphate (2) [ref]

Fixed		Measured
Pressure, kPa - Liquid	Temperature, K - Liquid	Mass fraction of sodium sulphate (2) - Liquid
101.00	353.15	0.0005

Mass fraction of sodium hydroxide (1) [ref]

Fixed		Measured
Temperature, K - Liquid	Pressure, kPa - Liquid	Mass fraction of sodium hydroxide (1) - Liquid
353.15	101.00	0.7432

Sources

Phase diagram for Na2SO4-NaOH-H2O system and Na2SO4 solubility in sodium aluminate solution with caustic ratios of 12 and 15 at 80 deg C

Note: These property values are available through the Cheméo API. A free account gives you an access key.