89, Actinium (Ac)
gr. actina = Strahl |
Säure-Base-Verhalten:
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Säure/Base-Verhalten der Actinium-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 |
Ac2O3 |
AcF3↓ |
Ac2(SO4)3↓ |
AcCl3 |
(CH3COO)3Ac |
Ac(OH)3↓ |
Ac(OH)3↓ |
Ac(OH)3↓ |
Ac(OH)3↓ |
Ac(OH)3↓ |
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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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Actinium-Ion |
Ac3+ |
9.4 |
Hydroxo-Actinium-Ion |
Ac(OH)2+ |
4.6 |
Hydroxo-Actinium-Ion |
Ac(OH)2+ |
9.9 |
Dihydroxo-Actinium-Ion |
Ac(OH)2+ |
4.1 |
Dihydroxo-Actinium-Ion |
Ac(OH)2+ |
11.1 |
Actiniumhydroxid |
Ac(OH)3 |
2.9 |
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