NaAsO4-2

Formula : NaAsO4-2

Dernière mise à jour le 25.01.2021

THERMODYNAMICS

Individual properties (298.15 K)
M
g·mol-1
 V°
cm3·mol-1
 ΔGºf
J·mol-1
 ΔHºf
J·mol-1
 Sº
J·mol-1·k-1
 CP
J·mol-1·K-1
161.909 -17.195 (Ref.: 07mar/acc) Marini L, Accornero M (2007) Prediction of the thermodynamic properties of metal-arsenate and metal-arsenite aqueous complexes to high temperatures and pressures and some geological consequences. Environ Geol 52:1343-1363 -935961 (Ref.: 07mar/acc) Marini L, Accornero M (2007) Prediction of the thermodynamic properties of metal-arsenate and metal-arsenite aqueous complexes to high temperatures and pressures and some geological consequences. Environ Geol 52:1343-1363 -1062689 (Ref.: Internal calculation) 202.924 (Ref.: 07mar/acc) Marini L, Accornero M (2007) Prediction of the thermodynamic properties of metal-arsenate and metal-arsenite aqueous complexes to high temperatures and pressures and some geological consequences. Environ Geol 52:1343-1363 -348.99 (Ref.: 07mar/acc) Marini L, Accornero M (2007) Prediction of the thermodynamic properties of metal-arsenate and metal-arsenite aqueous complexes to high temperatures and pressures and some geological consequences. Environ Geol 52:1343-1363
HKF coefficients
a1·10
J·mol-1·bar-1
 a2·10-2
J·mol-1
 a3
J·K·mol-1·bar-1
 a4·10-4
J·K·mol-1
 c1
J·mol-1·K-1
 c2·10-4
J·K·mol-1
 ω·10-5
J·mol-1
1.1816 -29.6792 35.9079 -10.4006 -170.1160 -45.5060 10.4956
Reaction properties

H2AsO4- + Na+ ⇌ NaAsO4-2 + 2H+

298.15 K, 1 bar log10K: -13.87 ΔH°r:87299 J·mol-1 (Ref.: Internal calculation)
T(°C) 0 25 60 100 150 200 250 300
log10K -15.35 -13.87 -12.38 -11.26 -10.44 -10.07 -10.01 -10.23
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
-349.333415 -0.071708 16125.209208 129.335993 -1535333.049637