As(OH)3

Formula : As(OH)3

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
125.944 47.438 (Ref.: 08per/pok) Perfetti E., Pokrovski G., Ballerat-Busserolles K., Majer V., Gibert F. (2008) Densities and heat capacities of aqueous arsenious and arsenic acid solutions to 350 C and 300 bar, and revised thermodynamic properties of As(OH)3(aq), AsO(OH)3(aq) and iron sulfarsenide minerals. Geochimica et Cosmochimica Acta 72, 713-731 -639800 (Ref.: 08per/pok) Perfetti E., Pokrovski G., Ballerat-Busserolles K., Majer V., Gibert F. (2008) Densities and heat capacities of aqueous arsenious and arsenic acid solutions to 350 C and 300 bar, and revised thermodynamic properties of As(OH)3(aq), AsO(OH)3(aq) and iron sulfarsenide minerals. Geochimica et Cosmochimica Acta 72, 713-731 -737306 (Ref.: Internal calculation) 212.400 (Ref.: 08per/pok) Perfetti E., Pokrovski G., Ballerat-Busserolles K., Majer V., Gibert F. (2008) Densities and heat capacities of aqueous arsenious and arsenic acid solutions to 350 C and 300 bar, and revised thermodynamic properties of As(OH)3(aq), AsO(OH)3(aq) and iron sulfarsenide minerals. Geochimica et Cosmochimica Acta 72, 713-731 89.27 (Ref.: 08per/pok) Perfetti E., Pokrovski G., Ballerat-Busserolles K., Majer V., Gibert F. (2008) Densities and heat capacities of aqueous arsenious and arsenic acid solutions to 350 C and 300 bar, and revised thermodynamic properties of As(OH)3(aq), AsO(OH)3(aq) and iron sulfarsenide minerals. Geochimica et Cosmochimica Acta 72, 713-731
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
45.2000 16.1000 43.7000 -18.0000 186.2000 -47.7000 0.5200
Reaction properties

H2AsO3- + H+ ⇌ As(OH)3

298.15 K, 1 bar log10K: 9.26 ΔH°r:-28176 J·mol-1 (Ref.: Internal calculation)
T(°C) 0 25 60 100 150 200 250 300
log10K 9.67 9.26 8.72 8.21 7.73 7.39 7.17 7.09
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
14.914501 0.015860 4999.232862 -8.754169 -488342.056777