23, Vanadium (V)

Freya Vanadis (Germ. Mythologie)

Säure-Base-Verhalten:
         
   
  Ti V Cr  
  Zr Nb Mo  
         
   
 
   
   
   
   
   

Säure/Base-Verhalten der Vanadium-Oxide:
  Reaktionen mit:
HF
100%		 H2SO4
conc.		 HCl
20%		 CH3COOH
25%		 H2O NH3
25%		 NaOH 10%
kalt		 NaOH 50%
heiß		 NaOH liq.
400°C
V2O5 VO2F (VO2)2SO4 VO2Cl V2O5↓ V2O5↓ NH4VO3 NaVO3 NaVO3 NaVO3
 
Legende: Lösung   Unlöslich   sauer →  neutral  → alkalisch  
 
 

pKS-Werte von Säure-Base-Paaren (HA + H2O ↔ H3O+ + A-) :
Säurename Formel pKS-Wert Basenname Formel pKB-Wert
Vanadium(II)-Ion V2+ 6.85 Hydroxo-Vanadium(II)-Ion V(OH)+ 7.15
Vanadium(III)-Ion V3+ 2.92 Hydroxo-Vanadium(III)-Ion V(OH)2+ 11.08
Hydroxo-Vanadium(III)-Ion V(OH)2+ 3.41 Dihydroxo-Vanadium(III)-Ion V(OH)2+ 10.59
Dihydroxo-Vanadium(III)-Ion V(OH)2+ 4.10 Vanadium(III)hydroxid V(OH)3 9.9
Vanadyl(IV)-Ion VO2+ 5.66 Hydroxovanadyl(IV)-Ion VO(OH)+ 8.34
Hydroxovanadyl(IV)-Ion VO(OH)+ 6.34 Vanadyl(IV)hydroxid VO(OH)2 7.66
Vanadyl(IV)hydroxid VO(OH)2 5.70 Trihydroxovanadat(IV)-Ion VO(OH)3- 8.3
Metavanadium(V)säure HVO3 3.80 Metavanadat-Ion VO3- 10.2
Vanadyl(V)-Ion VO2+ 1.83 Orthovanadiumsäure H3VO4 12.17
Orthovanadiumsäure H3VO4 2.6 Dihydrogenorthovanadat(V)-Ion H2VO4- 11.4
Dihydrogenorthovanadat(V)-Ion H2VO4- 7.92 Hydrogenorthovanadat(V)-Ion HVO42- 6.08
Hydrogenorthovanadat(V)-Ion HVO42- 13.27 Orthovanadat-Ion VO43- 0.73