13, Aluminium (Al)
lat. alumen = Alaunstein |
Säure-Base-Verhalten:
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Säure/Base-Verhalten der Aluminium-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 |
[1]Al2O3 |
AlF3↓ |
Al2(SO4)3 |
AlCl3(aq) |
(CH3COO)2Al(OH) |
Al(OH)3↓ |
Al(OH)3↓ |
NaAl(OH)4 |
NaAl(OH)4 |
NaAlO2 |
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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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Aluminium-Ion |
Al3+ |
4.89 |
Hydroxo-Aluminium-Ion |
Al(OH)2+ |
9.11 |
Hydroxo-Aluminium-Ion |
Al(OH)2+ |
5.43 |
Dihydroxo-Aluminium-Ion |
Al(OH)2+ |
8.57 |
Dihydroxo-Aluminium-Ion |
Al(OH)2+ |
5.86 |
Aluminiumhydroxid |
Al(OH)3 |
8.14 |
Aluminiumhydroxid |
Al(OH)3 |
11.22 |
Tetrahydroxo-Aluminat-Ion |
Al(OH)4- |
2.78 |
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