RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

Show Detailed Complexation Query Results


Surface Complex Formation Data:

Mineral: amorphous Silica
Reference: BB01
SCM Type: TL - Triple Layer
Ligand: Cr<3+> - chromium(III)
Site Type: »Si-OH
Equation: »Si-OH + Cr<3+> + 2 H2O  ⇔  »Si-O-Cr(OH)2 + 3 H<1+>
LogK: -4.0 ± 0.2         LogK°I=0 (Conversion to I = 0):   -3.36
Experiment: Potentiometric Titration
Ionic Strength: 0.1 mol/L KNO3
pH Range: 2.5-5.5
Fit Method:
Comment: bad fit: WSOS/DF=49-150! because of uncertain value of the actual solubility product; 5*10E-4 Cr solution; log K(ipSOCr(OH)2)=3.6+-0.36, log K=(-pK2)+log K(ipSOCr(OH)2)
 
1 data sets were retrieved