58, Cer (Ce)
Cerium, Planetoid Ceres |
Säure-Base-Verhalten:
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Säure/Base-Verhalten der Cer-Oxide: |
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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↓ |
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Legende: |
Lösung |
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Unlöslich |
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sauer → neutral → alkalisch |
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pKS-Werte von Säure-Base-Paaren (HA + H2O ↔ H3O+ + A-) : |
Säurename |
Formel |
pKS-Wert |
Basenname |
Formel |
pKB-Wert |
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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 |
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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 |
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