58, Cer (Ce)

Cerium, Planetoid Ceres

Säure-Base-Verhalten:

         
   
  La Ce Pr  
  Ac Th Pa  
         
   
 
   
   
   
   
   

Säure/Base-Verhalten der Cer-Oxide:

  Reaktionen mit:
HF
100%
H2SO4
conc.
HCl
20%
CH3COOH
25%
H2O NH3
25%
NaOH 10%
kalt
NaOH 50%
heiß
NaOH liq.
400°C
Ce2O3 CeF3 Ce2(SO4)3 CeCl3 (CH3COO)3Ce Ce(OH)3 Ce(OH)3 Ce(OH)3 Ce(OH)3 Na3Ce(OH)6
CeO2 CeF4 Ce(SO4)2 CeCl4 (CH3COO)4Ce Ce(OH)4 Ce(OH)4 Ce(OH)4 Ce(OH)4
 
Legende: Lösung   Unlöslich   sauer →  neutral  → alkalisch  
 
 

pKS-Werte von Säure-Base-Paaren (HA + H2O ↔ H3O+ + A-) :

Säurename Formel pKS-Wert Basenname Formel pKB-Wert

Cer(III)-Ion Ce3+ 8.35 Hydroxo-Cer(III)-Ion Ce(OH)2+ 5.65
Hydroxo-Cer(III)-Ion Ce(OH)2+ 9.25 Dihydroxo-Cer(III)-Ion Ce(OH)2+ 4.75
Dihydroxo-Cer(III)-Ion Ce(OH)2+ 9.60 Cer(III)hydroxid Ce(OH)3 4.4
Cer(III)hydroxid Ce(OH)3 12.10 Tetrahydroxocerat(III)-Ion Ce(OH)4- 1.9

Cer(IV)-Ion Ce4+ -1.15 Hydroxo-Cer(IV)-Ion Ce(OH)3+ 15.15
Hydroxo-Cer(IV)-Ion Ce(OH)3+ 0.82 Dihydroxo-Cer(IV)-Ion Ce(OH)22+ 13.18
Dihydroxo-Cer(IV)-Ion Ce(OH)22+ 1.68 Trihydroxo-Cer(IV)-Ion Ce(OH)3+ 12.32
Trihydroxo-Cer(IV)-Ion Ce(OH)3+ 2.29 Cer(IV)hydroxid Ce(OH)4 11.71