CaHAsO4

Formula : CaHAsO4

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
180.005 1.914 (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 -1282681 (Ref.: 95mir/kis) Mironova V.E., Kiselev V.P., Egizaryan M.B., Golovnev N.N., Pashkov G.L. (1995) Ion association in aqueous solutions of calcium arsenate. Russ. J. Inorg. Chem., 40, 1690-1691 -1443169 (Ref.: Internal calculation) 14.644 (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 -23.79 (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
8.4634 -11.8934 28.2713 -11.1357 11.7529 -17.4925 -0.1590
Reaction properties

H2AsO4- + Ca+2 ⇌ CaHAsO4 + H+

298.15 K, 1 bar log10K: -4.08 ΔH°r:9480 J·mol-1 (Ref.: Internal calculation)
T(°C) 0 25 60 100 150 200 250 300
log10K -4.23 -4.08 -3.90 -3.73 -3.51 -3.24 -2.89 -2.35
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
850.555697 0.136737 -45213.964741 -311.741924 2456112.646435