NIST TRC ThermoML Dataset

Thermodynamic properties of binary aqueous solutions of orthophosphate salts, sodium, potassium and ammonium at T = 298.15 K El Guendouzi, M.; Benbiyi, A.; Fluid Phase Equilibria 2014, 369, 68-85

Journal: Fluid Phase Equilibria
Sample Quantity(ies): Relative activity
Methodology: isopiestic method
Phase(s): Liquid
Substances:
1. water H2O (XLYOFNOQVPJJNP-UHFFFAOYSA-N) - Commercial source
2. dipotassium phosphate HK2O4P (ZPWVASYFFYYZEW-UHFFFAOYSA-L) - Commercial source

Data

P = 101 kPa, T = 298.15 K
m (mol kg^-1)	γ_i (mol dm³ mol-1 dm^-3)
0.10	0.9957
3.00	0.8933
3.50	0.871
4.00	0.8485
4.50	0.824
5.00	0.8004
5.50	0.774
6.00	0.7464
7.00	0.6884
8.00	0.6307
9.00	0.5716
0.20	0.9917
9.66	0.5314
0.30	0.988
0.40	0.9845
0.50	0.9811
1.00	0.9642
1.50	0.9481
2.00	0.9311
2.50	0.9132

11949; water + dipotassium hydrogen phosphate; 00004:00526