76, Osmium (Os)
gr. osme = Geruch |
Säure-Base-Verhalten:
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Säure/Base-Verhalten der Osmium-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 |
OsO2 |
OsO2↓ |
OsO2↓ |
OsO2↓ |
OsO2↓ |
OsO2↓ |
OsO2↓ |
Na2OsO3(?) |
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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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Perosmiumsäure |
H4OsO6 |
7.2 |
Trihydrogenperosmat(VIII)-Ion |
H3OsO6- |
6.8 |
Trihydrogenperosmat(VIII)-Ion |
H3OsO6- |
12.2 |
Dihydrogenperosmat(VIII)-Ion |
H2OsO62- |
1.8 |
Dihydrogenperosmat(VIII)-Ion |
H2OsO62- |
13.95 |
Hydrogenperosmat(VIII)-Ion |
HOsO63- |
0.05 |
Hydrogenperosmat(VIII)-Ion |
HOsO63- |
14.17 |
Perosmat(VIII)-Ion |
OsO64- |
-0.17 |
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