92, Uran (U)
Uranium, Uranos (gr. Mythologie), Planet Uranus |
Säure-Base-Verhalten:
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Säure/Base-Verhalten der Uran-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 |
UO3 |
UO2F2 |
UO2SO4 |
UO2Cl2 |
UO2(CH3COO)2 |
UO2(OH)2↓ |
NaUO2(OH)3 |
NaUO2(OH)3 |
Na2UO2(OH)4 |
Na2UO4 |
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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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Uran(IV)-Ion |
U4+ |
0.29 |
Hydroxo-Uran(IV)-Ion |
U(OH)3+ |
13.71 |
Hydroxo-Uran(IV)-Ion |
U(OH)3+ |
1.49 |
Dihydroxo-Uran(IV)-Ion |
U(OH)22+ |
12.51 |
Dihydroxo-Uran(IV)-Ion |
U(OH)22+ |
3.37 |
Trihydroxo-Uran(IV)-Ion |
U(OH)3+ |
10.63 |
Trihydroxo-Uran(IV)-Ion |
U(OH)3+ |
5.65 |
Uran(IV)hydroxid |
U(OH)4 |
8.35 |
Uran(IV)hydroxid |
U(OH)4 |
7.5 |
Pentahydroxo-Uranat(IV)-Ion |
U(OH)5- |
6.5 |
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Uranyl(VI)-Ion |
UO22+ |
5.2 |
Hydroxo-Uranyl(VI)-Ion |
UO2(OH)+ |
8.8 |
Hydroxo-Uranyl(VI)-Ion |
UO2(OH)+ |
6.8 |
Uranyl(VI)hydroxid |
UO2(OH)2 |
7.2 |
Uranyl(VI)hydroxid |
UO2(OH)2 |
7.2 |
Trihydroxo-Uranat(VI)-Ion |
UO2(OH)3- |
6.8 |
Trihydroxo-Uranat(VI)-Ion |
UO2(OH)3- |
13.8 |
Tetrahydroxo-Uranat(VI)-Ion |
UO2(OH)42- |
0.2 |
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